A plumber was called to fix a pipe at a doctor's house. He arrived, banged on the pipes for 15 minutes, and said to the doctor, "Well, that'll be $200."

The startled surgeon replied "Two hundred dollars! Why that's $800 per hour! I'm a brain surgeon and even I don't make that much!"

"Yes, I know what you mean," The plumber replied "I used to be a surgeon myself."