Hard Light Productions Forums
Off-Topic Discussion => General Discussion => Topic started by: Black Wolf on September 27, 2002, 06:42:37 am
-
And I don't mean a bucket of water on the door, or sticking a coin to the floor. I'm talking about serious, major, extremely funny practical jokes. Here's the scenario.
I'm on the verge of completing year 12 and finishing school forever. It's traditional to do some jokes and pranks, simple stuff, vaseline on the railings, powdering desks, etc. etc. Not good enough for me. I have almost a month, access to one room without setting off any alarms or anything, and friends to help me. Now I need an idea. Be feindinsh, but try to think of stuff that doesn't involve permanent damage. I don't intend to get caught, but if I do, well, I'd like to start Uni without a criminal record.
Ideas please :D
-
Find two doors on opposite sides of a hallway that both open into the classroom, then tie the handle together with a piece of rope.
Bucket of water down the stairs and onto the heads of everyone during the iccle break between classes.
Go there on a night with a bucket of petrol. Tip it out onto the school-field in the shape of your name. Set fire to it.
Buy about 50 cans of silly-string and waste an entire class-room, then use whatever's left to cocoon the door.
-
I'd suggest something like removing the covers from all the school bells, but that kinda backfired when the principal/teachers thought that our school responded better without the bells always ringing..... anyway, that's my only suggestion. Since I didn't get to finish Year 12, all those years ago now, I never got involved in muck-up day, so my prankish ideas all suck :)
-
Well, it's an outdoor classroom, so no hallway, and we have an electric siren, so no bell cover. The Silly String Might work though... :)
-
Outdoor....? What the? Where do you go to school?
I'm curious because my school is outdoor, too. Country Day, USVI. Probably not the same school, though ;)
Anyways, stinkbomb in the desk of the worst teacher you can think of. Bring ex-lax brownies to school, then cover the toilet with clear plastic wrap.
Get some pr0n pics and put them in another student's file...;)
You get the drift:D
-
Steal one of your teachers' boat and put it in the school's swimming pool, with the teacher's dog in it.
:nervous:
-
Originally posted by Unkown Target
Get some pr0n pics and put them in another student's file...;)
prefebally someone not excersising boxing on a regular basis, might I add.
-
OK, if you can find a great big weather ballon, stick it in a room and fill it with water (you'll need a pump, natch).
The sucker landed with removing it is right up the creek - he can't move it and he don't wanna burst it. :ha:
-
Find some way to fill the entire room with water, using duct tape around the door edges and sticking a hose in the top door crack.
Failing that, grab a few buckets of lavendar paint and paint EVERYTHING in the room.
-
do the "bucket of water above the door" using concentrated hydrochloric acid
-
GE's idea using lime jello over a cold winter night on the second or third floor. Expensive, and you need some help you can trust, but highly effective. I got really pissed off when they nixed that one this year for hotwiring the buses and parking them across the driveways as barricades.
Get a black wire (or paint it black), coat it along its entire length with oil or some other grease, and string it at a diagonal along any wooded part of the nearby roads. To avoid serious charges, make sure the, uh, "landing area" is reasonably clear and flat.
All of my other plans from the past hinge strongly on not getting caught, and generally involve a jail term and/or lynching if you do, so I doubt they're your sort.
-
Stretch a large balloon over the exhaust pipe of the head teacher's car.
Paint 'welcome to hell' somewhere near the school entrance.
Get an empty paint can with a tight fitting lid and quarter fill it with baking soda/powder, fill another quarter with vinegar and tightly seal the whole shebang and shake it gently for about ten seconds, leave it in a corridor between classes and make an extremely hasty escape. Make sure you're wearing old, destroyable clothing in case it backfires and goes off in your face, it stinks for days.
Fill a 'super soaker' type gun with a mixture of iron filings and dilute! sulphuric acid. Keep this stuff off you at all costs it's absolutely stinking. Spray on all available targets.
I was not here, you saw and heard nothing
-
Ooh, I forgot my own contribution, I was jsut thinking of "senior prank" things-
On the day of some big teacher meeting or open house or something, when the teachers are gonna come put late and halfway hungover, print out a big batch of (preferably glossy, all-weather-type) bumper stickers reading OFF THE PIGS in huge letters. Absolutely the most beautifyl sight you will ever see is a parking lot full of these babies, sitting where a drunk 40-year-old P.E. major won't see 'em but the next porker will.:D
-
Drop 9V batteries in all the urinals. Everytime someone pisses on one they'll get a helluva surprise.
-
Wax the blackboards with a floor wax, buff clear. That's a ***** to use chalk on.
Disable the intercoms and add your own special annoucements to be played by remote.
Make the clocks run backwards, or at a different speed
Change the room numbers
Switch the hinges on the doors
Reverse the light switchs on/off or rewire the switches to things
Put floor tiles on the ceiling and vice versa
3 words- Chalk body outlines
Tweak the thermometer to turn on the heat when the temp goes up and AC when it gets colder.
Stuff a skeleton or dummy in the ceiling to fall through and dangle from a string, set off by remote.
Uuuh more when I can think of them.
-
Set the home pages of all the school computers to the all your base flash site, or the hiagajaoki or whatever it is...
-
or goatse (thats as much as i will mention about that)
-
You know that plastic that covers the boxes, that packs things, is like a big roll of Glad Cling Wrap, well do it to a car, roll it aroud it untill it has a think layer of plastic.
Add some laxative to the coffe
Cover the car with shaving cream
Flood the chemistry class room, like it happend 3 years ago, a bastard left open the water valve and covered the drainage, yeah, it was cool the day after that the teacher was really mad :mad: :mad2: .
Throw a Stinkbomb in the middle of a school reunion.
Set the computers to start bios password.
Play around with the software of the shool computers.
:D
-
School computer pranks are always good... find some good start pages at http://www.albinoblacksheep.com/flash
They have the Hjokbii thing and other really demented stuff there.
-
Phear the burn. :shaking:
-
Computer pranks don't qualify. People do those on their own so much that schools secure the computers to the point of uselessness as a habit.
If people tend to jam the locks on their lockers at school, just stay after and unjam them all. Nobody'll remember their combination. Someone did this at my school a week or so ago- they still haven't caught him, even though he's told my entire class (and thus most of the school by extension via small-town effect).
-
People do those on their own so much that schools secure the computers to the point of uselessness as a habit.
They do a pretty bad job at it, too. :p :D
-
A-men to that!
...
Dammit, where's an 'evil cackle' emoticon when you need one?
-
Actually, it was really funny what they did with the computers in my school; they put in all kinds of security crap so that the computer take 10+ minutes to start up, any user input would have a delayed response, and so on; they disabled the start menu and ctrl-alt-del too. The funny thing was that you could just go into VC++ (or any other program) and the standard windows open file dialog let you manipulate anything on the hard drive as well as the entire network of machines. :D
-
Bwahahaaa.
Mine, it actually has a fairly competent security man (unlike the computer I'm working on- this site was actually on the "restricted" list, but he left the list so I could modify it), but the Microsoft security routines suck. You can't change the desktop, but you can wipe the hard disk.:D
-
Originally posted by an0n
Drop 9V batteries in all the urinals. Everytime someone pisses on one they'll get a helluva surprise.
ROFLMAO!!!!!!!!!!!!!!!!!!! Does that really work??? :wtf:
-
Well, what i did was that i changed all the settings of the network of the classroom, no one could print anything, go to the internet, and other stuff. and the security fortress was active. They never knew who was and they had a bad time to fix it. :lol:
:ha: :ha: :ha:
Those pice of crapy computers, to start windows its like 6 minutes, to shutdown is like 4 minutes.
-
If any doors have ights next to them, connect the wires to the door handles.
If there are any braille signs, file them off.
Put expanding foam anywhere you like OR cause a can of it to explode!
Freeze a can of shaving foam, cut off the can, leaving only the block of foam. Put the block in an airtight container (some car gloveboxes work). wait, after an hour or two the foam qwill defrost but not expand. when the box is opened... fssssshhhhh!
-
I formatted one computer at school many many years ago... hmm, don't know if they managed to put it to work again, it at least might had cost a bit.
That an0n's 9V thing would be fun. :D
-
Place some big stink bombs with little detonators iside the school's air vents and detonate them from your home while you are taking "A day off". ;7
-
Originally posted by Sandwich
ROFLMAO!!!!!!!!!!!!!!!!!!! Does that really work??? :wtf:
Quite well actually :)
Only, if the urinal is flooded the battery might start to smoke or it could explode.
-
Ha ha Stealth. Suck my Editage! :drevil:
-
(http://www.3dap.com/hlp/staff/maeglamor/pros.jpg)
Ahem.
-
:D :D :D :D :D
-
...have you a common room for year 12's at school? Something i've heard about to trash it for next year's lot, is hide raw fish around the place. If you have suspended ceiling tiles, then hide the odd whole makrel above them. Within a few hours, the place will stink.
For a wider area affect, look into emptying a can of tuna in brine water into the air conditioning/ventilation system of the school.
...unscrew assorted chair legs around the school, so that when people sit on them the chairs collapse.
...Other things to put in exhaust pipes for cars include eggs (which should fire out th eback) and, if you are in a particularly vengful mood, use pollyfiller to expand in the exhaust pipe, and blow the engine.
...one of my most entertaining (yet childish) games at school, is, for when someone leaves the class for a short period of time, to turn upside down everything on their desk: books, pencil case, chair, computer keyboard and mouse.
This could easily be transformed to a larger scale. With a small group of friends, pick a classroom, then turn over everything you can. Chairs, desks, tables, even filling cabinates and shelves if you can. The beauty of this, is that you leave it as neat as you found it. Its not about destruction, its about confusion. ;)
-
...unscrew assorted chair legs around the school, so that when people sit on them the chairs collapse.
Someone did this once in several of the classrooms here at the end of the last school year; it was really weird, since as the students entered the classroom and sat on the chairs, they all began to collapse, and for a while nobody could figure out what was going on. :D
Drop 9V batteries in all the urinals. Everytime someone pisses on one they'll get a helluva surprise.
I love this one... :D :D
-
I remember, a couple years back, this one time when we were gettin lectured in class. The teacher was sitting in one of those cheap office chairs, the kind where the wheels come off if you pick it up, and this one crack-head kid was sitting next to him. About halfway into the lecture, the kid leaned forward and handed the teacher a metal pole. The teacher stoped, took it from him (with a wierd look), put it on the table, and continued. A minute later, same ting with some kind of screw. And again. Finally, just as the teacher was reaching some kind of dramatic climax, he leaned back and the chair, minus all of its screws, collapsed under him.:D
-
The guy gave the teacher the screws and he didn't even see what they were? :wtf: :lol: :D :D
-
I still think the 9V in the toilet would be good. I'll have to try that.
-
trick gum. one stick and you're addicted to heroin.
-
trick gum. one stick and you're addicted to heroin
:drevil:
-
Heeey, they make heroin in chewable form now???
Wouldn't that be cool? I can just see it... cross between Trainspotting and the school playground. Maybe Nickelodeon can make a dumb TV show based on it.:D
EDIT: Just remembered- out here it wouldn't change much, anyway. I'm damn POSITIVE I saw one of those little rats shooting up under the slide the other day. And they wouldn't even share...
Anyway. If you don't have easy access to high explosives, pitchblende, or industrial quantities of blood, your best bet is to think like a performance artist. You know those little tripod things they put in the centers of pizzas? One of your classmates, no matter what high school you go to, will work at a pizza place. Get him to get 500 of those babies, and lay them upside-down over the entire front lawn. TH=hat sort of thing.
That, or declare the school building an independent Communist nation, and recruit your class to fortify it. If the UN refuses to admit you, embargo the leading nations and declare war on Russia, claiming that they are backsliders. Draft a constitution declaring yourself Premier or Dictator-For-Life, whichever title suits, and be sure to have an entourage of your more loyal friends about at all times. If you can get crops to grow on the land you have, put the middle-schoolers to work- otherwise, liberate the nearest supermarket. It's not likely you'll be able to get nuclear capabilities on the scale you'll have, but keep an eye out for any kid who catches a cold- schools are great for developing bioweapons. On a regular basis, conduct purges of those seditionists who secretly or overtly support a return to capitalism, execute a few as a warning, and exile the rest to the janitor's closet for life- feeding them is optional.
Keep in mind that little kids make ideal cannon fodder, if it comes to a government showdown, and that as a last resort you can light them on fire and launch them at hostile forces via catapult.
-
can't remember where I heard this one:
get 4 pigs. number them 1, 2, 3, and 5.
the joke is having everyone search for pig number 4.
-
Suck it up sucka phish!
-
Why would anyone be looking for your pigs? Why would they care how many pigs you had? How would you make it to the "getting everyone to look for #4" stage if you brought a bunch of pigs to school?
See, you have to consider these things. Like, if you declare the school an independent nation, you have to be sure that your AAA defenses are up-to-date, and capable of tracking supersonic bombers, such as an industrialized nation like the US has, and likely will use. And to supply the populace with a large quantity of entertaining propoganda, to keep them imagining you are benevolent and that government officials and hired mercs aren't going to take their lunch money by force to pay for ballistic missiles and make them do slave labor at the farming collective.
-
Originally posted by Stryke 9
Why would anyone be looking for your pigs? Why would they care how many pigs you had? How would you make it to the "getting everyone to look for #4" stage if you brought a bunch of pigs to school?
my god, do you not understand it? :wtf:
-
Unless this is some kind of twisted reference to "this little piggy", I think I do.
-
Hey did your lil pinky piggy go to the market to buy Roast Beef? Mine did, and i was scared as hell. If he could eat his own kind, who knows how safe i am? :nervous:
3 pigs in a blanket, where's the fourth one?
-
[looks down to discover that he has three toes, and that the third one from the big toe is looking abnormally fat]
-
:welcome:
-
Originally posted by Knight Templar
Hey did your lil pinky piggy go to the market to buy Roast Beef? Mine did, and i was scared as hell. If he could eat his own kind, who knows how safe i am? :nervous:
lol, pigs are pork dude.
Anyway, here is my current list of stuff to do (not that this is a final list, so keep the ideas coming :) )
Batteries in the toilets - Oh yeah ;7
Weather Balloon - If we can get one, we're doing this.
Frozen Shaving Cream - Yes, yes, possibly inside the weather balloon, though I doubt that'd work for the expanding trick, more as a space filler - something easier to carry than water, but will still explode outwards. More likely as a last day present for my geography teacher. :devilidea:
Independent communist nation - This idea apppeals to me, but I doubt I'd get any willing assailants. And my schools AAA defenses are definitely out of date.
Oh, and no Pizza place workers. We have one, family owned, independent Pizza store in my cruddy little town, who don't even have small plastic things.
-
If possible, try wedging a door closed. You know the wooden wedges you get? Try making a smaller version that will fit under selected door without being seen. Make 2 so the door can't be pushed in either direction.
Plant wedges a few minutes before the lunch bell or the end of the school day.
...watch the confusion/panic/mad crush that ensues.
-
Originally posted by beatspete
If possible, try wedging a door closed. You know the wooden wedges you get? Try making a smaller version that will fit under selected door without being seen. Make 2 so the door can't be pushed in either direction.
Plant wedges a few minutes before the lunch bell or the end of the school day.
...watch the confusion/panic/mad crush that ensues.
if you put a wedge on both sides, you'd end up stuck inside the room.... :wtf:
-
... And thus wouldn't get expected! You'd have an alibi!
Except, of course, that it would only work if the door opened outwards, and you wouldn't be able to get the outward-facing wedge in from the inside.
-
Dip all the toilet rolls in weak Sodium Hydroxide, leave them to dry, then put them back on the roll thingies.
Put vast amounts of laxitives in any well-used food or drinks dispenser, then flood/jam/burn/explode all the toilets. Or better yet, smear *expletive* across the seat, so they either have to crap themselves or wipe down the seat (probably still **** themselves) and get someone elses poop/man-juice all over their ass.
If you can steal some caesium from the chem-labs, drop a big-ass chunk of it in each toilet. KABOOOOOOOMMMMMM!!!!!
Get about 50,000 power-balls and drop them simultaneously off the roof at break/lunch/end-O-school. WARNING: May cause severe death, serious injury or concussion. But it's still funny as hell.
Cover all the toilet seats in nail-polish remover, link them all with a trail of NPR and light it. Very cool effect. Can also be done while stalls are occupied. You can tone it down and just do a circle around each toilet and light one whenever someone goes into the stall. VERY funny.
-
Dude, if you're going for the explosives angle, just inject a full, closed soda can with nitroglycerine, plug thehole so nobody notices, and leave it to sit, preferably in a fridge. When someone tries to steal it, the little jolt of CO2 escaping that happens when you first open a can will be plenty.:D
That, or vial of sulfuric acid with a non-acid-safe cork, inverted over some potassium chloride. Guerilla time bomb. Run like hell.
-
Originally posted by Stryke 9
That, or vial of sulfuric acid with a non-acid-safe cork, inverted over some potassium chloride. Guerilla time bomb. Run like hell.
Heh - that reminds me of the time-delayed road-side bomb we'd make in the army. Basically you take a fragmentation grenade, stand it up in a tupperware container of water so that the water reaches 2/3rds of the way to the top, and stick it in the freezer. Once the water's frozen, take it out of the freezer, place it somewhere, and remove the grenade's pin. The ice will now be the only thing holding the grenade's lever in place, and eventually, as long as you're not at the north pole... ;7 ;7 ;7
-
Cool. I'd think that the water would somehow interfere with the grenade, but that is a pretty good idea. :D
The time bomb was part of the "incendiary" chapter in a Cuban revolutionary warfare manual. Got some great **** in there, and most of it's the sort of thing you can make in your kitchen (well, provided your kitchen has gunpowder), and it's perfect for pranks (if by "pranks" you mean localized armed insurrections). Stuff like tucking a lit cigarette in a book of matches, and laying it on a stack of papers in a room with a lot of flammables. At one point, I even found a diagram showing how to booby-trap a (thick) porn magazine.:D
-
As far as timers/delays go, you can't beat cigarette-based trigger charges.
-
Originally posted by heretic
if you put a wedge on both sides, you'd end up stuck inside the room.... :wtf:
Intersting point... I was visuallising blocking the door at the front stairs of my school, and my school (with its crazy architecture) is hexagonal... so i would just make my escape down the back stairs.
Ideally, choose a corridor. You are less likely to be seen doing it, there is usually a way of escaping from both sides, and the flow of people is generally greater.
...use 2 people.
-
Here's a suggestion for something a bit simpler and just as effective. You should be able to paint that room of yours in short order. :D
Materials:
Fruit Cocktail (or similar fruit) (Use a blender if you really want a mess!)
Yeast (you can get it at the grocery store)
2 liter bottle with lid
Mix fruit Cocktail and yeast and fill the bottle. Put the lid on and tighten.
Leave the bottle sitting in an inconspicuous spot at room temperature. Within 1-5 hrs, the room will be painted with fruit cocktail!
Note: this actually happened in a college dorm room. The occupants were attempting to make wine and neglected to allow the mixture to breathe.
-
... on a similar note of drinks bottle based weapons, find a plastic bottle of between 500ml and 3 litres. Make sure it has a cap that will easilly twist off, Evian mineral water bottles are very good for this. Take the empty bottle and hold it in you hand (or between thighs for a larger bottle), squeeze, aim, and quickly twist of the lid, without really holding it too much. If you get it right, the lid will rifle of at a great speed ;)
With good technique and a good bottle, the lid will go for about 5 meters before slowing down due to air resistance. Generally, when they land, they are still spining quickly.
Its a great trick to play on unsuspecting people. "hey look at this bottle" *pop*
-
'Course, if they actually DO look at a bottle when someone tells them to in high school, you can probably get them to do any number of things...:D
-
Originally posted by Stryke 9
Cool. I'd think that the water would somehow interfere with the grenade, but that is a pretty good idea. :D
Nope - a typical frag. grenade is a completely solid bit of metal except for the hole in the top where the detonation mechanisim goes.
-
Hmmm... A thread about practical jokes, and we're discussing ways to set time bombs. I love the internet!:D
-
Originally posted by Stryke 9
I love the internet!:D
I prefer the word "appreciate", personally. :p
-
WOOT!!!! I APPRECIATE THE INTERNET!!!!
-
I have a good idea for a scam. Organize them a slumber party at school. When they are taking a nap, provoke Carl and throw him in. That would scare the pants of them.
-
Originally posted by Razor
I have a good idea for a scam. Organize them a slumber party at school. When they are taking a nap, provoke Carl and throw him in. That would scare the pants of them.
hmmmmmmmm.....
/me thinks that would get millions of negative response... espcially at high/middle schools ;7
-
:snipe:
-
:eek3:
-
See if you can create a shortcut to somewhere. That's how we got around a lot of our schools security.
-
Curious yet?
-
Originally posted by Sandwich
I prefer the word "appreciate", personally. :p
Yes, sometimes you can have too much of a good thing...:nervous:
-
Originally posted by Knight Templar
hehe high school slumber party, i wouldn't mind having some slumber with a few girls at my high school ;7
That sounds like a very good idea! ;7 :thepimp: Too bad I am on the holiday.
-
sorry to the bore here...
but most of thise pranks involve vandalism it seems....
-
Originally posted by Carl
WOOT!!!! I APPRECIATE THE INTERNET!!!!
:lol:
-
Originally posted by Crazy_Ivan80
sorry to the bore here...
but most of thise pranks involve vandalism it seems....
mine don't :D
-
Originally posted by Crazy_Ivan80
but most of thise pranks involve vandalism it seems....
Only 33% of my suggestions invlolve vandalism.
16.5% Involve projectiles.
33% involve compressed air.
16.5% involve wedging wood places
16.5% involve fish.
33% involve furnature.
Intresting facts for you.
-
How about a dab of Ben-Gay on each football players Jockstraps?
Then invite the school to that days practice...
-
Anybody got any that WON'T get you arrested/kicked out of school/deported/killed?
-
Starting a pan-school crime syndicate, uniting all the bullies (for extortion), people who sell term papers and tests, and the drug dealers? If you go to a public school, I'm sure that you and the powers-that-be could come to an understanding, if you took a consideration for their low paychecks...:D
Fact is, you'd probably never get caught, if you were at all careful. Prank, vengeance against the school, AND a source of income!
-
Get a Uzi with plenty ammo. Shoot everyone in the school, then shoot yourself in the head.
I'd laugh.
-
It's been done.
A more original idea would be to set a small incindiary devices onto the spark-plugs of the principals car, then trail some fuse/slow-combustables to the petrol tank, to which there would be attached several large high-explosive charges with shaped dishes so as to direct blast force towards approproate areas. Then once the car is a km or so from the school......KABOOOOOOOMMMM!!!!!
-
Or just take the bolts off of some of the wheels. More fun, that way.
-
Just steal the car :D
-
Originally posted by beatspete
...have you a common room for year 12's at school? Something i've heard about to trash it for next year's lot, is hide raw fish around the place. If you have suspended ceiling tiles, then hide the odd whole makrel above them. Within a few hours, the place will stink.
For a wider area affect, look into emptying a can of tuna in brine water into the air conditioning/ventilation system of the school.
bah! I know the thing that's even worse. In sweden we have a special fish dish called "surströmming", translatable to something like "sour fish" (so I don't know the english name for that kind of fish). Anyway... it's packed in tin cans, and upon opening (which any smart being does only when the can is fully submerged in water) it emits the most terrible stench known to mankind. The fish isn't rotten, but it is on that side of tastelessness. People actually eats this. With a can of that fish in a room, it doesn't take five minutes before the whole room is filled with the "wonderful aroma"... The fluid it is packed with also has that smell.
-
Originally posted by Stryke 9
I remember, a couple years back, this one time when we were gettin lectured in class. The teacher was sitting in one of those cheap office chairs, the kind where the wheels come off if you pick it up, and this one crack-head kid was sitting next to him. About halfway into the lecture, the kid leaned forward and handed the teacher a metal pole. The teacher stoped, took it from him (with a wierd look), put it on the table, and continued. A minute later, same ting with some kind of screw. And again. Finally, just as the teacher was reaching some kind of dramatic climax, he leaned back and the chair, minus all of its screws, collapsed under him.:D
Are you serious?! Ohhh man! I'd pay to see that live. :D
-
If you REALLY want to get a teacher good, soak everything in the room with water. Then put baking soda in the air vents when there isn't any air blowing. Then turn the A/C on as low as it'll go and get the hell out! :D
One time a teacher gave out shaving gel as a christmas gift. I kept that till april fools. Right when Biology was over and everyone left for lunch, I took my time getting ready. When everyone left, I went ballistic. :D I put some on the board saying "Chris wuz here". Then I put some of it on the back of the teacher's chair (specifically where he'd grab it to pull it out). He even had a roll of paper towels out. I sprayed the rest of the contents of the can on them. :p
At the end of the day, he said I was in "big trouble" then he laughed his ass off. :D
-
Ooooh, I just thought of a good one. Remember the old paper blast caps that kids put in toy guns? Not the circular ones, but the flat kind. Put some of those in the top frame of a door-way and gently close the door. The next time someone closes the door, they'll get a loud suprise. :D