There was this truck driver who had to deliver five hundred penguins to the state zoo. As he was driving his truck through the desert, the truck breaks down. After waiting by the side of the road for about three hours he waves another truck down and offers the driver $500 to take these penguins to the state zoo for him.
The next day the first truck driver arrives in town and sees the second truck driver crossing the road with 500 penguins walking in single file behind him.
The first truck driver jumps out of his truck and says, "What's going on? I gave you $500 to take these penguins to the zoo!"
The second truck driver replies, "I did take them to the zoo. And I had enough money left over so now we're going to see a movie."