Mechanic vs Cardiologist

from email

A Honda mechanic was removing a cylinder head from the motor of a Honda 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 car when the mechanic shouted across the garage, Hey Doc, want to take a look at this?

The cardiologist, a bit surprised walked over to where the mechanic was working on the Honda.

The mechanic straightened up, wiped his hands on a rag and asked,

So Doc, Look at this engine. I opened its heart, took the valves out, repaired or replaced anything damaged, and then put everything back in, and when I finished, it worked just like new. So how is it that I make $24,000 a year and you make $1.7M when you and I are doing basically the same work?

The cardiologist paused, leaned over, and then whispered to the mechanic…

Try doing it with the engine running!!!