A lawyer and a blond are sitting next to each other on a flight from Los Angeles to New York. The lawyer asks if she would like to play a fun game. The blond is tired and just wants to take a nap, so she politely declines and rolls over to the window to take a nap.
But the lawyer persists ....
He explains how the game works. "I ask you a question, and if you don’t know the answer, you pay me. You then ask me a question, and if I don't know the answer, I pay you." Again, the blond politely declines and tries to get some sleep.
The lawyer figures that since his opponent is a blond he will easily win the match, so he makes another offer, "If you don’t know the answer, you pay me only $5, but if I don’t know the answer, I will pay you $500."
The blond figures there will be no end to this torment unless she plays, so she agrees. The lawyer asks, "What’s the distance from the Earth to the moon?" The blond reaches in to her purse, pulls out $5 and hands it to the lawyer.
Then she asks the lawyer "What goes up a hill with three legs, and comes down with four?" The lawyer is puzzled. He uses his laptop to search for references. He taps into the air-phone with his modem and searches the Internet and the Library of Congress. Frustrated, he sends emails to his co-workers and friends. No luck. After an hour, he gives up. He wakes the blond and hands her $500.
The blond politely takes the $500 and turns away to get back to sleep. The lawyer, who is going nuts trying to figure it out, wakes the blond and asks, "Well, so what goes up a hill with three legs and comes down with four?"
The blond reaches into her purse, hands the lawyer $5, and goes back to sleep.