A ob/gyn gets fed up with the ridiculous malpractice insurance and decides to quit and become a mechanic. He enrolls in mechanic school and does really well. The day of the final exam comes which entails completely disassembling a car and putting it back together in working order. The ex-ob/gyn does his best and waits expectantly for his final grade. On the day the grades are released, the former baby catcher sees his final grade listed as 150%! Perplexed, he asks the instructor why he had such a high grade.
The instructor says, "I gave you 50% for completely disassembling the car perfectly, 50% for putting it back in working order without error, and 50% for doing it all through the tailpipe."