A cowboy rides up to a saloon on his horse. He goes in, orders a drink, then leaves. His horse is gone. He goes back to the saloon, and asks, "Where's my horse?"
No one replies. So he says, "I'll order one more drink, and then if my horse isn't outside, I'll have to do what i did in Texas and I don't like doing that."
So the locals hurry around, and when he leaves, his horse is outside.
As the stranger gets on his horse, the bartender asks, "What did you do in Texas?" to which the cowboy replies, "I had to walk home."