Mechanic Vs. Surgeon

A mechanic was removing a cylinder head from the motor of a Harley
Davidson 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 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 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."