A man walks into a bar and sees a sign that says, "Free drinks for the person who can make our horse laugh."
The man thinks to himself, "I've got this." So he walks up to the horse and whispers something in its ear. The horse bursts out laughing, rolling on the floor and snorting with delight.
The bartender is amazed and asks the man, "What did you say to that horse to make it laugh like that?"
The man replies, "I told him my paycheck."