Also @Josh and @Devon - In fourth grade, Pokemon took my class by storm and this guy Kevin had made a small business out of collecting the most cards via trading and buying. He kept them all in one of those gallon-size Ziploc bags and (obviously) brought them to school every day. One day after recess, a bunch of us came back to find him in tears looking down over a ledge into an air shaft where our school met the side of the next building over (I went to school in downtown SF for a bit). The owners had, I guess, put in a net about halfway down (4+ stories) to keep pigeons out, so when we looked over, you could see hundreds of Pokemon cards strewn onto it.
Someone had dumped his entire bag over the ledge to prank him. #tragic