A mechanic was removing a cylinder head from a Honda CB750 when he spotted a famous surgeon in his shop. The surgeon was waiting for the service manager to take a look at his bike, when the mechanic shouted across the floor: Hey Doc, can I ask you a question?
The surgeon, a little surprised, walked over to where he was working on the bike. The mechanic stood up, wiped his hands on a rag and said "Look at this engine, I open it's heart, take the valves out, repair any other damage and put them back in, and when I finish, it works like new. So how come I get paid so little, while you get paid so much?"
The doctor smiled, leaned over to him and whispered in his ear "Try doing that with the engine running!"
Cheers, Terry.