At the end of a joke it says What goes up the mountain with three legs and comes back down with four? and the woman gives the man $5 what is the answer or how does the joke go?
A lawyer sits down next to a blond on a plane. The lawyer asks the blond "would you like to make a bet?". The lawyer tells the blond "I will ask you a question if you can not answer it you have to give me $5. If you can ask me a question that I don't know then I will give you $50."
So the blond asks him the question What goes up a mountain with 3 legs and come back with four? So he spends the entire flight trying to figure it out. at the end of the flight he hands her $50. She gets up to leave and he says "wait, what's the answer? and the blond gives him $5 and walks away.