An auto mechanic was removing the cylinder heads from the motor of a car when he spotted the famous heart surgeon in his shop waiting for the service manager to look at his car.

The mechanic shouted across the garage, “Hey Doctor! Come over here for a minute.”

The heart surgeon, a bit surprised, walked over to the mechanic.

The mechanic straightened up, wiped his hands on a rag and asked argumentatively, “So doctor, look at this. I also open hearts, take valves out, grind ‘em, put in new parts, and when I’m finished this will work like new.

So how come you get the big money, when you and me is doing basically the same work? ”

The doctor leaned over and whispered to the mechanic…

He said: “Try doing it when the engine is running”.

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