Feeling worn out and depleted, a gynecologist decided that he needed to cut his daily schedule and take up a hobby if
he was to retain his sanity.  He'd always enjoyed tinkering with engines so he decided he would take an evening course
in small engine mechanics.  He signed up for the course and found that it was just what he needed.  It was relaxing and
took his mind off of his daily routine. 
  
He did well in the academic portion of the course and was prepared for the final exam, which was to strip the engine
completely and then reassemble it in perfect working order.  So our gynecologist friend accepted the challenge,
performed the task, submitted his completed project and anxiously waited the result. 
  
He thought he would do well but was quite surprised when he received a grade of 150%!  He quickly phoned the instructor
and questioned the mark.  The instructor told him, "No that's right.  First I gave you 50% for stripping down the
engine - a very thorough job, by the way. 
  
Next I gave you 50% for reassembling it - a fantastic job actually, and then I gave you a 50% bonus for doing it all
through the muffler.