The Two Camrys
Puzzler time. This one is automotive in nature. Here we go.
Years ago in the shop, I had two Toyota Camrys side by each, as we say in the trade. One of them didn't run. It cranked when you turned the key, but it wouldn't fire up. And the other one was in for an emissions test.
So I say to my fellow mechanic, Ralph, "Go ahead and do these two cars."
So he takes the emissions tester probe, he sticks it in the tailpipe of the car, which he's supposed to do the emissions test. He opens the hood. Next thing I know, he's cranking and this car won't start.
He then takes the probe out of that tailpipe, sticks it in the other car, the car that didn't run. He turns the key. And of course, it doesn't start. It does the same thing that the first car did.
And I said, "What on earth are you doing?"
And he says, "It's like catching a cold. These cars are too close together."
Of course, it looks to me like he's just did the emissions test on the wrong car. But neither of them will start now. They both just crank and crank, but don't start.
But then he explains it to me and I said, "Ah ha!"
So the puzzler question is, what was he doing?