A Lexus mechanic was removing a cylinder head from the motor of an LS460 when he spotted a well-known cardiologist in his shop. The cardiologist was there waiting for the service manager to

A Lexus mechanic was removing a cylinder head from the motor of an LS460 when he spotted a well-known cardiologist in his shop.
The cardiologist was there waiting for the service manager to take a look at his car, which was making a mysterious ticking noise that even his stethoscope couldn't diagnose.

The mechanic, wiping his hands on a rag, walked over and said,
"Doc, I've been wondering something. I open up engines, take valves out, fix them, and put them back—just like you do with hearts. So how come I get paid a fraction of what you earn?"

The cardiologist smiled politely and replied,
"Well… try doing it while the engine is still running."

The mechanic blinked, looked down at the open engine he was working on, and said,
"...Okay, that’s fair. But to be honest, I still think I deserve hazard pay. At least your patients don't yell at you because their check engine light is still on!"

The cardiologist chuckled, "Touché! But tell me, do your patients call at 2 a.m. to say their motor’s making a weird noise and might need open-hood surgery right now?"

The mechanic grinned, “Only when they mistake their key fob for a pacemaker.”