Two men are working in a ditch when their super-visor walks by. One stops and asks the other why the boss gets paid more than they, when they do harder work. The other man doesn't know either, and suggests that the first go ask. When he does, the boss puts his hand against a tree and tells the worker to hit it as hard as he can. When the worker swings, the super-visor quickly moves his hand, and the worker hits the tree instead. "Now get back to work!" the injured man is impatiently ordered. When the worker gets back into his hole, his friend asks him what the answer was. In answer the worker puts his hand in front of his face. "See this hand? Hit it as hard as you can."