Boy do I know that is true. I have an expertise in photography. Last month I was playing frisbee with my dog. He ran into the street and was hit by a car. I ran out to him and could tell he had a broken leg and was bleeding internally. Obviously a crisis. The funny thing is the only thing I could think about was what shutter speed and aperture I would use to take a picture of the scene. It is just human nature to revert to your area expertise. Fortunately, my wife, who is not an expert at anything, gently lifted the dog up and took him to the vet. Luckily, he’s doing fine now.. There are really downsides to being an expert.
Dont be silly.
This is more like an equivalent example.
A physicist, an engineer and a mathematician were all in a hotel sleeping when a fire broke out in their respective rooms.
The physicist woke up, saw the fire, ran over to his desk, pulled out his CRC, and began working out all sorts of fluid dynamics equations. After a couple minutes, he threw down his pencil, got a graduated cylinder out of his suitcase, and measured out a precise amount of water. He threw it on the fire, extinguishing it, with not a drop wasted, and went back to sleep.
The engineer woke up, saw the fire, ran into the bathroom, turned on the faucets full-blast, flooding out the entire apartment, which put out the fire, and went back to sleep.
The mathematician woke up, saw the fire, ran over to his desk, began working through theorems, lemmas, hypotheses , you-name-it, and after a few minutes, put down his pencil triumphantly and exclaimed, "I have *proven* that I *can* put the fire out!" He then went back to sleep.