A man insisted to his psychiatrist that he had swallowed a horse. None of the doctor's persuasive tactics could persuade him to change his mind. In desperation, the psychiatrist agreed to "operate." The idea was simply to put the patient under and bring a horse into the operating room. When the patient came to, the doctor pointed to the horse and said, "Well, that won't worry you any more."
"That's not the one I swallowed," he said.
"That's a bay. My horse was white."