'Crack' Pants

A pair of pants, mysteriously left behind by someone, found their way into my English class. Our teacher picked them up and began going through the pockets for identification. What was suppose to be an attempt at embarrassing the student crazy enough to leave a pair of pants in English class; soon became an embarrassment to our teacher. She warned us she might find something unpleasant and joked about finding a wad of paper with something written on it. When she reached into the back pocket, she pulled out a tiny bag with white powder in it. Our eyes got very big and our mouths shut quickly while she held it up and seemed to ponder what it could be. About 10 seconds later the 'light bulb' in her mind came on and she bolted out of the room like a canon. The police were called and now the mystery of "Who left their pants in English class?' begins...but that's High School.