Heart Doctor vs. Mechanic Joke

At local car garage, a famous heart surgeon was waiting patiently for his Mercedes to be serviced.

He noticed a mechanic working on this high-end car.

He was removing the cylinder heads from the motor.

The mechanic noticed this fella looking over at him and waved to him to come over.

He said to the doc. after straightening up and wiping his hands clean, “Look at this car I’m working on.

This is the heart, I take an engine apart, take a few valves out, clean them up, grind them like new, and when I finish, this baby will purr like a kitten.

So how come you get the big bucks $$$$$, when you and I are doing basically the same work?”

The surgeon very calmly leaned over and whispered to the mechanic,

“Try doing it with the engine running.”