Not really crazy, but still hilarous. I had a really short teacher in 6th grade, who was about 4"3'. She had a computer chair that she sat on during class. During passing time, when she stood in the hall, some bad kids (i.e. me) would make her chair go as high as it could go. It was sooo funny. Some crazier ones involve saying swear words in this one teachers classroom, because he is almost deaf. We have a contest to see who can say words the loudest before getting cought. Then, when we have computer class, the teacher can see whatever we are doing in class when class is out, using the history, so a fun thing to do is to when a person is not at their deskm, to set their browser to some horrible "Innapropriate" site, and set the desktop to a picture we see there. Nobody gets in trouble for it, because there is no way for the teacher to know who did it.