Ok, here's my story.
Middle school art class - we were making paper mache masks. I was always doing stupid shit in the class, and I had the idea that it would be hilarious if I spilled the HUGE can of paste that we were using. I got my friends at my table to pitch in to give me 5 bucks if I spilled it. So at the end of the class, as I'm walking over to dump the paste into the sink, I pretend to slip and I juggle the can, doing my best acting job. I drop the can, but then I manage to step in the massive growing pool of paste, and I slip -- sending my body totally horizontal -- and fall right in the puddle.
I had to wear my gym clothes for the rest of the day.
Willco: I had a pretty bad temper when I was a kid too. I didn't totally beat the shit out of kids though, I just punched them in the face once, and usually that was enough. This is like elementary school, though.