A mechanic was removing a cylinder head from the motor of a Harley-Davidson motorcycle when he spotted a well-known heart surgeon in the shop.
The surgeon was waiting for the service manager to come look at his bike, when the mechanic shouted across the garage, “Hey Doc! Can I ask you a question?”
The surgeon, a bit surprised, walked to where the mechanic was working on the motorcycle. The mechanic straightened, wiped his hands on a rag, and asked, “Doc, look at this engine. I open its heart, take valves out, fix ’em, put ’em back in, and when I finish it works just like new. How come I get such a small salary and you get really big bucks, when we are basically doing the same thing?”
The surgeon paused, smiled, leaned over and whispered to the mechanic, “Try doing it with the engine running.”