As Small As a Mouse

The doctors were talking about their work.
“I had great success with one of my patients,” said the first doctor. “When he came to me, he thought he was as small as a mouse.”
“And you cured him?” the second docter asked.
“I convinced him that many of the world’s greatest men were small,” the first docter said, “He was doing quite well. Then – I lost him.”
“What happened?”
“It was an accident,” the doctor sighed sadly, “A pussy cat ate him.”