j.k. rowling. >> whoo! the game. >> it's the most bizarre and excellent sport i have ever participated in before in my life. >> i've always been a really big fan of "harry potter," and just kind of being able to be an adult playing quidditch is kind of really cool from my childhood dreams. >> ♪ our heads could do with filling with some interesting stuff ♪ >> the game was introduced to the muggle world in 2005. a student at another school -- middlebury college in vermont -- adapted it to real life. since then, its popularity has grown by leaps and bounds. now, there are nearly 200 teams across the country and abroad. here at vassar, students have been suiting up, or "brooming up," since 2007. [ cheering ] recently, i was invited to a practice. before i could start, i needed to know the basics. although they haven't harnessed the power to fly, brooms are still a necessity. is that a nimbus 2000? >> oh, we wish. [ both laugh ] no, we're gonna be placing an order for new brooms soon. these are our "clean sweeps