Bored during a long flight, an eminent scholar leaned over
and woke up the sleeping man next to him to ask if he would
like to play a game.

Ill ask you a question, the scholar explained, and if
you dont know the answer, you pay me $5. Then you ask me a
question, and if I dont know the answer, Ill pay you $50.

When the man agreed to play, the scholar asked, Whats the
distance from the earth to the moon? Flummoxed, the man
handed him $5. Ha! said the scholar. Its 238,857 miles.
Now its your turn.

The man was silent for a few moments. Then he asked, What
goes up a hill with three legs and comes down with four?

Puzzled, the scholar racked his brains for an hour–but to
no avail. Finally he took out his wallet and handed over
$50. Okay, okay, what is the answer? the scholar asked.

The man said, I dont know, pulled out a $5 bill, handed
it to the scholar, and went back to sleep.