One day, a doctor drove his car to the workshop for
repair.
After repairing the car, the mechanic said to the doctor, "Hey doc,
my job is about the same as yours. I dismantled up the car, took
out the engine, fix the broken parts, soon it's up and running
again. But how come i earn so much lesser than you?"
The doctor paused for a while and replied, "Try doing it with the
engine on."
