Heart Surgeon / Mechanic

A mechanic was removing a cylinder head from the
motor of a Harley motorcycle when he spotted a well-known heart surgeon
in his shop

The surgeon was there waiting for the service manager to come take a look
at his bike when the mechanic shouted across the garage,

"Hey Doc, can I ask you a question The surgeon, 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 out the valves, repair any damage, and then put them back in,
and when I finish, it works just like new. So how come I get such a small salary and
you get the really big bucks, when you and I are doing basically
the same work?

The surgeon paused, smiled and leaned over, and whispered to the
mechanic

"Try doing it with the engine running."