Graduation

Fact- The graduation tradition of throwing your caps in the air was started by the graduates of the US Naval Academy in 1912. The graduates, who upon graduation would receive officers' caps, and threw their no-longer-needed midshipman's caps to celebrate their promotions.

Further Info- The practice soon caught on and was copied at graduation ceremonies at other schools. But it's apparently dangerous to throw your mortarboard in the air. There have been several documented incidents of students becoming injured as a result and many schools have banned the practice.

Behind the Scenes- nothing interesting