A motor mechanic was removing a cylinder head from the engine of a Jaguar XJ12 when he spotted a well-known Cardiologist in his workshop.
He was waiting for the service manager to take a look at his car, which was undergoing major repair.
The mechanic shouted across the garage, “Hello Dr, want to come and take a look at this?”
The Cardiologist (a ‘Mr’), a bit surprised, walked over to where the mechanic was working on the Jag.
The mechanic straightened up, wiped his hands on a rag, and asked…
“So Doc, look at this amazing engine. I open its heart, take the valves out, repair any damage and then put them back in. When I finish, it works just like new.”
“So how come I only make £25,000 a year, a pretty small salary compared to you, when you and I are doing basically the same work?”
The cardiologist paused, smiled, and leaned over, then whispered to the mechanic…
“Try doing it with the engine running.”
…know your value!