A mechanic was removing a cylinder-head from a car when he spotted a well-known cardiologist at the reception.
The cardiologist was waiting for the service manager to come take a look at his car when the mechanic shouted across the garage, "Hey Doc, want to take a look at this?"
The cardiologist, a bit surprised, walked over to where the mechanic was working. The mechanic straightened up, wiped his hands on a rag and asked, "So Doc, look at this engine. I open its heart, took 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 make $45,000 a year and you get the really big money at $400,000.00 when you and I are doing basically the same work?"
The cardiologist paused, smiled and leaned over, and whispered to the mechanic...
''Try doing it with the engine running...."
