The only bomb on the internet that i saw and utilized was really simple years ago. I made a pneumatic potato gun, and was exploring the idea of launching explosives out of it. In particular something that could fit down a 1 inch diameter barrel.
Then came the mini co2 cartridge explosive. Empty mini co2 filled with gun powder with a fuse. I made it a 3 man operation to make it safe as possible. One person to light the fuse, the person holding the explosive immediately lets it fall down the barrel after it's lit. I was listening for the clink noise of the explosive against the metal ball valve once it makes its way down the barrel, and that's how i know i need to make release the air pressure to make it fly away from me. Those two people immediately run for reasonable cover away from me holding the gun after their jobs have been performed, because there was a good risk of me exploding.
Luckily it went as planned safely, especially with my choice of slower burning fuse. The only fool in the plan was me based on what my job in all of it was. It ended up exploding overhead of the dry river bed 40 feet above a bunch of seagulls 300 feet away from the launch point. With a satisfying bang of 6ft diameter explosion of smokeless gun powder. Poor seagulls, they were all nesting and i scared the **** out of them really good (unintended, we got in there to do the test, and out pretty fast).
For a good musical i recommend little shop or horrors with rick moranis and john candy.