Mechanic vs Doctor

I think there are a few of us who will appreciate this one......

Ralph...

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 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."

Thanks Ralph B.