Blindfolded Sit-Up (game) Pretend to try and convince 3 people that they canít do a blindfolded sit-up. The first 2 are in on it. One at a time, they strain but donít do a sit-up. The third sits up into a cream pie (his face, that is).

Or, you can challenge them to do 10 sit-ups in 10 seconds, five of them with their eyes closed.