A mechanic was removing a cylinder head from a V8 when he looked up and spotted a well-known cardiologist in the repair shop who was waiting for the service manager to take a look at his car.

The mechanic shouted across the garage, “Hey doc, c’mere and take a look at this.” The cardiologist, a bit surprised, walked over to where the mechanic was working.

The mechanic straightened up, wiped his hands on a rag and asked, “So, doc, look at this car. I opened its heart, took the valves out, repaired and replaced anything that was damaged and then put everything back in. And when I finished, it worked just like new. So how is it that I make $38,000 a year and you make $1.7 million when you and I are doing basically the same work?”

The cardiologist paused, then said to the mechanic, “Try doing it with the engine running.”