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 always been good at making people laugh, how hard could it be to make a horse laugh?" So he walks over to the bartender and asks about the challenge.
The bartender nods and points to a huge horse standing in the corner of the bar. The man walks up to the horse and whispers something in its ear. Suddenly, the horse bursts out laughing uncontrollably. The man is shocked and amazed that his joke was able to make the horse laugh.
The bartender hands him a free drink and says, "Congratulations, you've won! But I have to ask, what did you say to the horse to make him laugh?"
The man smiles and says, "I told him I was a better jockey than he is."