Where's the ladies' clothing?
This was a few years ago. I was shopping at an outlet mall with my brother, tried on a sweater, didn't like it, so I went to put it back.
Rather than just toss it on the display I meticulously folded it back to form. I mis have been really engaged, because this lady walks over and asks me the titular question.
I said, "I dunno, over there I think" and nodded to the other end of the store and kept folding. She continued to stand there, so I looked back at her and her jaw had dropped, and was staring at me. I was confused too and thought maybe there was a spider in my hair or something.
We both made the realization at the same time and both our faces simultaneously changed to a chuckle. She walked away still laughing.
My brother, having saw the whole thing, told me, "well, you *do* look like you work here"