A gynecologist was getting sick of his job and decided that he needed a career change. He'd always enjoyed tinkering with motorcycle engines so thought he'd become a motorcycle mechanic. The good doctor went along to the American Institute of Motorcycling, the best motorcycle mechanics school in the country, and completed the training class. The final exam was to strip a bike engine completely and reassemble it - obviously back into perfect working order. So our gynecologist friend did the test and anxiously awaited the result. The day he received the results he got quite a surprise, he got 150%! He quickly phoned the instructor and queried the mark. The instructor said, "No, no that's right. First I gave you 50% for stripping down the engine -- a very thorough job. Next I gave you 50% for reassembling it - a fantastic job really. Then I gave you a 50% bonus for doing it all through the muffler."