I thought this was a relatively uncommon sport, but college schools actually have teams of Ultimate. Had a chance to play in the spring, and it was a blast. Did pull my groin, but it sure was fun. Some people call it Frisbee Football, as it's played with a Frisbee and on a football field. Here is more info:
http://en.wikipedia.org/wiki/Ultimate_(sport)
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HELL YEAH!!
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I used to play all the time when I was in the army. We used it as PT on certain days. Lot's of fun. Haven't played since though!
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Ultimate a really fun time. In Gettysburg over the summer the seasonal rangers and interns would play a few days a week.
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