Medicoz v/s Einstein

Medicoz v/s Einstein: . .

Einstein & a Medicoz sitting next to each other on a long flight..

Einstein says,"Let's play a game..

I will ask you a question,if you don't know the answer,

you pay me only $5 and if I don't know the answer, I will pay you $500.."

Einstein asks the first question: What's the distance from the Earth to the Moon..?

Medicoz doesn't say a word,reaches his pocket,pulls out a $5..

Now,it's Medicoz's turn..

He asks Einstein: What goes up a hill with 3 legs and comes down on 4 legs..?

Einstein searches the net and asks all his smart friends..

After an hour he gives Medicoz $500..

Einstein going nuts and asks: Well,so what goes up a hill with three legs and comes down with four..?

Medicoz reaches his pocket and gives Einstein 5$....!!!