We used to do it all the time at different camps. We never used the towel, just told the kid that it was impossible to do a situp with their eyes closed after they've been spun in circles. IF you could hold a straight face, and get enough people insisting on it, the kid would usually fall for trying to prove it. You'd set it up so you'd spin him, then he'd lay down and on the count of three, he'd sit up, slamming his face right into someone's
