A Smart Blonde

A lawyer and a blonde woman are sitting next to each other on a long
flight. The lawyer asks her 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, that the game is a lot of fun. ‘I ask you a
question.If you don’t know the answer, you pay me only $5.

If you ask me a question and if I don’t know the answer,

 I will pay you $500.

This catches the blonde’s attention.

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. She reaches into 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 and searches all references. He uses the
Air-phone. 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.