The famous surgeon was convinced that, owing to his renown and undeniable success in the medical profession, everyone he met believed him to be excessively rich and in need of a little cheating.
When the fellow was presented with a large bill for car repairs, he had reached his limit.
"This is ridiculous!" said he, "Charging me eight hundred dollars to grind the valves and put in new piston rings."
"Not really," replied the manager of the repair shop, "just think about it. You are a surgeon and should know that an automobile engine is just as complicated as a human body. The mechanic who serviced your car is just as skilled as you are."
"Is that so?" the surgeon muttered, "Well, let me see him grind valves while the engine is running ..."