Morris, the loudmouth mechanic, was removing the cylinder heads from the motor of a car when he spotted a famous heart surgeon who was standing off to the side, waiting for the service manager to come take a look at his Mercedes.
Morris shouted across the garage, “Hey Doc! Is dat you? Come on ova’ here a minute.”
The famous surgeon, a bit surprised, walked over to where Morris the mechanic was working on the car.
Morris straightened up, wiped his hands on a rag, and asked argumentatively, “So, Mr. Fancy Doctor, look at dis here work. I ALSO open hearts, take valves out, grind ‘em, put in new parts, and when I finish dis baby will purr like a kitten. So how come you get da big bucks, when you an’ me is doing basically da same work?”
The surgeon leaned over and whispered to Morris the loudmouth mechanic, “Try doing it with the engine running.