I was at Williams gunsight one time buying holsters. I asked the clerk if he was certain that the holster on the counter would work with my handgun. I was hoping he'd get one out of the display case. He said "It should" (not good enough for me!) so I said "can we find out for sure?"
Right at the point, I had an itch near the small of my back and I tended to it.
He bellowed, "No No No No No No No No No No No No No No No!"
It took me by surprise, but then I chuckled when I realized the situation the timing of events had created.
I don't blame the guy. I still chuckle about it when I go in there.