An old lawyer was sitting next to a young lawyer on a plane. The young lawyer turns to the old guy and says "hey it's going to be a really long flight. Why don't we play a game to pass the time? I'll ask you a question and if you can't answer it, you give me $5. Then you ask me a question and if I can't answer it, I give you $5"
Old lawyer: "Go away. I want to sleep."
The young lawyer was very confident in his abilities. So he said: "OK, what if you give me $5 if you get the answer wrong. But if I get the answer wrong, I give you $500".
This gets the old man's interest so he agrees.
Young lawyer: "What is the distance from the Earth to the Moon?"
Old lawyer: "I don't know. Here's $5"
Young lawyer: "Your turn".
Old lawyer: "What goes up a hill on four legs, comes down with three legs, is covered in colourful feathers but can't fly, and has a tail that looks like a beaver?"
The young lawyer can't figure it out. After some time, he opens his wallet and gives the old man $500. The old man puts it away, then turns around and goes to sleep.
The young lawyer is a bit miffed. He said "hey, you need to tell me the answer!"
The old lawyer pulls out his wallet and gives him $5.