our skool is pretty tightarse, but i decided to chuck stink bombs into classroom windows. cause there were so many year 12's having water fights and dressing up running around teachers couldn't find out who it was. heaps of classrooms had to evacuate, it was pretty funny
i heard later on that :
one of the science labs were doing an experiment and a beaker reacted chemically with the bomb and broke
also, one class's teacher locked them inside with the bomb, didn't want yr 12 prank to ruin his lesson, and some chick threw up in the classroom!