I like it! For all the mechanics out there, here's one I recently heard:
After seeing the same thing day after day, a gynecologist ponders his career choice and decides to make a change. The next day he enrolls in a vocational school to learn auto mechanics. After months of studying and training he's ready for his final exam. When he see's his final score, he's excited to learn that he received 150 points out of a possible 100. Curiously, he asks his instructor how he could have scored so high. The instructor tells him "I gave you 50 points for the meticulous way you took the engine apart. Each part was cleaned and inspected for damage. I gave you another 50 points for the way you put the engine together. It fired over and purred like a kitten on the first crank". "What was the 50 points for?" the former gynecologist asked. The instructor said "I gave you the extra 50 bonus points because I've never seen anyone do all this through the tailpipe before!"