How to play real-life Quidditch
30 December 2010 Last updated at 00:23 GMT
Quidditch, the game popularised in the Harry Potter books, is now being played by students in colleges around the world.
But shackled by the laws of gravity how do humans - or muggles - translate the magical airborne sport to real life?
Rajini Vaidyanathan joined the team of George Washington University to find out how to play the game.