Heart Surgeon and the Mechanic
A mechanic was removing the cylinder heads from the motor of a car,when he spotted the world-famous heart surgeon in his shop. The heart surgeon was standing off to the side, waiting for the service manager to come take a look at his car. The mechanic shouted across the garage, "Hello Doctor, please come on over here for a minute." The famous surgeon, a bit surprised, walked over to the mechanic where he stood. The mechanic straightened up, wiped his hands on a rag and asked, "So doctor, look at this here. I also open hearts, take valves out, grind 'em, put in new parts, and when I finish this will work just like a new one. So how come you get the really big money, when you and I are doing basically the same work?" The doctor smiled, leaned over, and whispered to the mechanic "Try doing it with the engine running!"