Many colleges and universities have their own local urban legends. One of the most common is that when anyone manages to graduate without ever having had sex, something unlikely will happen.

At the University of Florida, when a virgin graduates, a brick will fall from Century Tower. It still has all its bricks, which is received as ironclad evidence that everyone gets laid. (Not true -- I was living proof). Wiseguys sometimes walk by the tower wearing hard hats, and every few years someone brings a brick on stage during the graduation ceremony.

At other schools, sitting statues stand up or leave the campus in disgust. (I'd appreciate hearing about equivalent traditions at other schools).