Marcel was removing a cylinder head from the engine of a truck when he spotted a well known heart surgeon in his shop.
The surgeon was there, waiting to book his car in for service.
Marcel shouted across the garage, " Hey, Doc, can I ask you a question " ?
The surgeon a bit surprised, walked over to Marcel....
Marcel straightened up, wiped his hands on a rag and asked, " So Doc, look at this engine, I open it's 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 money, when you and I are doing basically the same work "?
The surgeon paused, smiled and leaned over, and whispered to Marcel...
"Try doing it with the engine running".