Umm. The first week of summer two of the kids I was keeping (keep in mind I was the only authority figure,) decided it would be funny to dress me up as a woman. Needless to say, one of the parents walked in.
The best. Hmm. One of my friends fell asleep at like 11 at a party with about 50 other people there. Me and five other friends stayed the night, and after everybody else left, we took his pants and put them at the top of a tree in the park across the street.
For sheer stupidity, though, joyriding in a shopping cart at 1:00 am can't be beat.