the mechanic an the cardiologist

[Bitter End]

A mechanic was removing a cylinder-head from the motor of a Harley motorcycle when he spotted a well-known cardiologist in his shop. The cardiologist was there waiting for the service manager to come and take a look at his bike 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 on the motorcycle. The mechanic straightened up, wiped his hands on a rag and asked, "So Doc, look at this engine. I open it's 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 make £18,000 a year and you get the really big money (£ 750,000) when you and I are doing basically the same work?"

The cardiologist paused,smiled and leaned over and then whispered to the mechanic...

"Try doing it with the engine running. "