At high school one of the biggest assholes of my year once got locked up in one at a party.
The kid got mad wasted and had to puke in the portapotty.
then a couple of kids tipped it over onto the side with the door, the poor kid was stuck in there for more than an hour, even tough he was a huge asshole, i wouldn't even wish such horror upon my worst enemy ...
the best part was that he had to call his dad to come save him, so his dad, a fancy businessman in a suit rolls up in this brand new mercedes with pale leather interior to come save his drunken, locked up and poo-covered son ... shit was hilarious but also pretty bad at the same time, if it wouldn't have been an asshole i'd have more problems with it, but since this kid was the worst i only have some minor mixed feelings :)