A man walks into a bar and sees a sign that says, "Free drinks for anyone who can make the donkey laugh." The man thinks this is a strange challenge but decides to give it a go.
He approaches the donkey and whispers something in its ear, and to everyone's surprise, the donkey starts laughing hysterically. The bartender is amazed and gives the man a free drink.
The man returns the next day and sees a new sign that says, "Free drinks for anyone who can make the donkey cry." The man thinks this is even more ridiculous than before but decides to try again.
He approaches the donkey and whispers something in its ear, and suddenly the donkey bursts into tears. The bartender is astounded and gives the man another free drink.
The man comes back a third day and sees a sign that says, "Free drinks for anyone who can make the donkey stop laughing and crying." The man is determined to win this challenge and approaches the donkey once more.
He whispers something in its ear, and the donkey suddenly stops laughing and crying. The bartender is dumbfounded and asks the man how he did it.
The man replies, "Well, the first day I told him I had a bigger carrot than he did. The second day I showed him it wasn't true. And today, I showed him for real."