A mechanic was removing the cylinder heads from the motorof a car when he spotted the famous heart surgeon in his shop,who was standing off to the side, waiting for the service managerto 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......
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. . . . He said: "Try to do it when the engine is running".