The MECHANIC and the CARDIOLOGIST

A mechanic was removing a cylinder-head from the motor of a Harley
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. So how come I make $39,675 a year and you get the
really big bucks ($1,695,759) 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'