Man vs. Donkey

A man walked into a bar. He noticed a jar filled with money with a note that said "Ask bartender how to win."
So the man asks the bartender, "What's the deal with this jar of money over here?"
The bartender replies, "I have a donkey in the back room. If you can go and make that donkey laugh, the money is all yours." The man goes into the room and comes out a few minutes later. The bartender is amazed to see that the donkey is laughing hysterically. So the man gets his money and leaves.

The next day the same man looks and sees that the jar is filled again.
He asks the bartender "So what's the deal now?"
The bartender says, "This time you got to go back there and make him cry." He gets up and goes into the room. The man comes out a few minutes later and the donkey is crying.
The bartender asks the man, "How did you get the donkey to laugh AND cry?"
So he says, "Well the first time I told him I ha