Next time, you should use that guy as a protective shield. He's obviously not gonna get hit by anything, so if you stand behind him...
Yeah, the stuff will pass right through him without touching him at all and hit you.
A glass bottle, though? Yeesh, you were dumber as a kid than I was. Which is probably a good thing, as I had blueprints for some KCl time bombs back then, and probably woulda taken out the whole block.
You know what's fun? Lightbulbs. They've got an inert gas in them, but if you make a pin-sized hole, fill 'em with gasoline vapor or purified hydrogen, and cover up the hole... fun!