A mechanic was removing a cylinder-head from the engine of a Harley Davidson motorcycle 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, 'Hey Doc, want to take a look at this?'

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

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, and when I finish, it works just like new. I went to school for this, am highly trained and experienced, and have people from all over the state that trust my work and depend on me not to screw up.

So how come I earn $50-grand a year working 50 hours a week, and you make 1.2-million doing basically the same work?'

The cardiologist paused, smiled and leaned over, then whispered to the mechanic… “Try doing it with the engine running.”