What could possibly go wrong?

An article in the paper this morning tells that many college students have started playing a version of the Harry Potter game "quiddich" by running around and playing a ball game with brooms between their legs.

If you choose to play this game and understand why this might be a bad idea, http://www.nuttybuddy.com/.  If you choose to play this game and do NOT understand why this might be a bad idea, ignore the previous sentence, please.