It was a couple years ago at a Walmart in upstate PA. Went to buy a brick of .22's. The clerk (prompted by the cash register screen) asked me if this was the proper caliber I needed. Said yes. Then (again reading from the screen), he asked me if I was over 21. I asked - over 21 what?. Taken off his routine, the clerk looked away from the screen and saw me. I must have looked unhappy to him with my bald head and grey whiskers because he apologized. Then, again looking at the screen, he asked me if that ammunition was for a handgun or a rifle. I replied - in a handgun or a rifle. So he asked me again, and I replied the same again. Then he looked at me with a face like a confused dog and asked me to reply, not to repeat the question. So I told him I was using it in a handgun or a rifle, whichever I grabbed first, and that was none of his doggone business.
The question is stupid, and a stupid question deserves a stupid answer. I took my bullets and never looked back.
Remembered the old George Carlin joke about big store clerks. Their IQ is never as high as their age.