Two friends, Harry and Potter, went together to play the slot machines at the casino. Each agreed that when his allotted money was gone, he would go set on the bench and wait for the other to finish.
Potter quickly lost all of his money and went to sit on the bench. He waited and waited and waited some more. After what seemed an eternity, he saw Harry coming toward him carrying a huge sack of coins.
"Hey, Potter," said Harry, "how'd you do?"
"Well, Harry", said Potter, "you see me here on this bench- what do you think? It looks like you hit it big, though." "Oh yeah," said Harry, "did I ever find a good machine! It's way in the back. I'll show it to you - you can't lose! Every time you put in a buck four quarters come out!"