Back in the 10th grade, during my World History teacher's lectures, I would randomly raise my hand and tell him that I had a "theory." These "theories" rarely had anything to do with the lecture, and were often ridiculous in nature. The other students got a kick out of them.

During my senior year, I drew a creature that was a cross between a dinosaur and a penis, and left it on the floor of my English class. The next day, my English teacher demanded that "the perpetrator come forward," and showed everyone my work of art. It was hilarious, and I got away scot-free.

There were more, but I can't remember them at the moment.