A lawyer and a blonde woman are sitting next to each other on a long flight. The lawyer asks if she would like to play a fun game. The blonde is tired and just wants to take a nap, so she politely declines and tries to catch a few winks. The lawyer persists, insisting that the game is a lot of fun. "I ask you a question, and if you don't know the answer, you pay me only $5; you ask me one, and if I don't know the answer, I will pay you $500." This catches the blonde's attention, so to keep him quiet, she agrees to play the game.
The lawyer asks the first question. "What's the distance from the earth to the moon?" The blonde doesn't say a word, reaches in to her purse, pulls out a five-dollar bill, and hands it to the lawyer. Now, it's the blonde's turn. She asks the lawyer, "What goes up a hill with three legs, and comes down with four?" The lawyer uses his laptop, searches all references. He uses the Airphone; he searches the Net and even the Library of Congress. He sends e-mails to all the smart friends he knows, all to no avail. After one hour of searching he finally gives up. He wakes up the blonde and hands her $500. The blonde takes the $500 and goes back to sleep.
The lawyer is going nuts not knowing the answer. He wakes her up and asks, "Well, so what goes up a hill with three legs and comes down with four?" The blonde reaches into her purse, hands the lawyer $5 and goes back to sleep.