Corny, but funny.
A Mechanic was removing a cylinder head from the motor of a Harley motorcycle when a well known heart surgeon came in to his shop. The surgeon was there waiting for the service manager to come take a look at his bike. The Mechanic shouted across the garage,
“Hey Doc, can I ask you a question?”
The Surgeon, a bit surprised, walked over to the mechanic working on the motor cycle. The Mechanic straightened up, wiped his hands on a rag and asked, ‘So, Doc, look at this engine. I open its heart, take valves out, fix ’em, put ’em 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 …..”