Sooooo many to choose from...
We'll go with this one:
My parents had sent me to a sleep-away camp for the summer. Not being the homesick type I was having a great time. Our cabin group was on an outcamp (tent camping away from the campground) and some of the boys had discovered that somebody had been partying on the site before us and left behind an entire trashcan FULL of empty booze bottles. The other kids were trying to blow up the bottles by filling them with flammable stuff and setting light to them. (bug spray, pine needles - that sort of stuff). Being the clever little fella that I was, I quickly stepped in to let them know that wasn't the right way to do it. So...
I grabbed a screw-top bottle with the cap on it, filled it with about 2 inches of water in the bottom, screwed the cap back on tight and tossed it in the fire. The water started to boil and fill the bottle with steam with enough pressure to blow the bottle into little pieces.
We were happy little boys.
Our cabin leader was not a happy little college student though. He came running out of his tent yelling at us.
Here comes the part that makes it stupid (and you thought it was the glass pieces flying out at us! )
I SWEAR TO GOD that what I remember the guy saying was "You should be more careful!"
So... When we were getting ready to blow up the SECOND bottle... we sat a picnic table over on its side to hide behind so we wouldn't get hit with any flying glass. ie. We were being more careful.
Poor cabin leader was back in his tent and came flying out the second he heard the steam escaping past the cap of the second bottle as it prepared to blow and kicked it out of the fire before it went.
He was fairly upset with us at that point.
Mike