The Lamplighter.
Two gallon jars, two candles, and any number of matches are necessary. The two contestants represent opposite factions in the group. Each one is given a jar, the candle and several matches, is told to sit on the jar with the right heel on the ground and the left heel resting on the right toe. He is to hold the candle in one hand, a match in the other, and is to light the candle without changing the position of the feet.
Before you scoff at them for being so slow, try it yourself.