| The source of more knee injuries than can possibly be imagined. Players unfortunate enough to play on astroturf can look forward to shortened careers, turf toe, and for baseball players 140oF gametime ground temperatures.
ESPN has a commercial running right now in support of a constitutional amendment banning astroturf. Update 2001/10/15 (Thanks to VT Hawkeye for pointing out this scene is a reenactment of a scene from Bull Durham. | 
