Jerry was removing some engine valves from a car on the lift when he spotted the famous heart surgeon, Dr. Samuel Kaiser, who was standing off to the side, waiting for the service manager.

Jerry, who was somewhat of a loud mouth, shouted across the garage, "Hey Kaiser, Is that you? Come over here a minute."

The famous surgeon, a bit surprised, walked over to where Jerry was working on the car. Jerry, in a loud voice that all could hear, said argumentatively, "So, Mr. fancy doctor, look at this work. Like you, I too take valves out, grind them, put in new parts, and when I'm finished, this baby will purr like a kitten. So how come you get the big bucks, when you and I are doing basically the same work?"

Dr. Kaiser, very embarrassed, shook his head and replied, "Try doing your work with the engine running."