In middle school, there was a kid on a local swim team with prosthetic feet. When it was time to swim, he'd wear these flipper like feet that seemed to be a major advantage. Nobody said anything b/c of the level of competition, but it seemed odd.

Oh, and in college, I played intramural soccer - one of the guys in my league had one leg and used crutches. He'd swat the ball with crutches all the time. What do you call that?? I mean, if it's on the ground, sure, but when it's 10 ft up?