A mechanic was fixing the engine of a car when he spotted a well-known cardiologist in his shop.
The cardiologist was there waiting for the service manager to come and take a look at his bike when the mechanic shouted across the garage.
He yelled: “Hey, Doc, want to take a look at this?”
The cardiologist, a bit surprised, walked over to where the mechanic was working on the car.
The mechanic straightened up, wiped his hands on a rag and asked: “So Doc, look at this engine. I open its heart, take the valves out, repair any damage and then put them back in. When I finish, it works just like new. So how come I make 40 grand a year and you get the big bucks when you and I are doing basically the same work?”
The cardiologist paused, smiled and leaned over, then whispered to the mechanic: “Try doing it with the engine running.”