One time (a long time ago when I was younger) my friend and I decided it would be fun to empty an entire Aqua Net hairspray can (one of the big ones) into the 5 gallon water bottles you get delivered to your home.
It took about 5 minutes of constant spraying before the can was emptied and in the bottle hung a think cloud of hairspray fumes. I don't know why, but I was the one holding the bottle with the flat bottom end against my chest on my knees in the middle of my friend's apartment.
Now comes the fun part.
He lit a match at the opening which when ignited, sounded like a jet engine in the middle of the living room. I flew back about 4-5 feet and from the sound the windows made, I thought for sure one or all of them were blown out. Luckily they weren't.
Well, we both lived and had to change our underwear but learned a valuable lesson in physics.
Moral: Don't be stupid.........