A marvelous answer

A mechanic was removing the cylinder heads from the motor of a car when
he spotted the famous heart surgeon in his shop, who was standing off to
the side, waiting for the service manager to come to take a look at his
car .

The mechanic shouted across the garage," Hello Doctor!! Please come over
here for a minute."

The famous surgeon, a bit surprised, walked over to the mechanic.

The mechanic straightened up, wiped his hands on a rag and asked
argumentatively, "So doctor, look at this. I also open hearts, take
valves out, grind 'em, put in new parts, and when I finish this will
work as a new one... So how come you get the big money, when you and me
is doing basically the same work? "

The doctor leaned over and whispered to the mechanic.....

Doctor said : " Try to do it when the Engine is RUNNING "