last year we had a sub in english (everyone knows you can fuck around with subs), so like 5 minutes into it, i write 2 notes for the class (i sat basically in the middle) to pass around and read. they were something along the lines of 'at 2:30, everyone just stand up and start clapping'. i didn't think anyone was really gonna do it, but sure enough at 2:30, everyone put down the books they were reading (so the class was completely quiet before), stood up and started clapping. the sub looked at us like we were fucking crazy, and asked what was going on, and one of the girls up front said 'oh, we do this every day'.
fucking around with fire and chemicals in science is another personal favorite of mine... this had nothing to do with me, but a couple years ago, this one girl took like a bouncy-ball sized amount of pure potassium from class and put it in her pocket. needless to say, her pants damn near caught fire later that day...
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i curse your pubes with the fleas of a thousand
camels