As I was walking from the train station to my office this morning, I heard "Excuse me! Excuse me!" from behind. I turned around to see what was going on. It was a black woman in her mid-thirties. She approached me and said "Turn around! Turn around" (No, I don't think that it's just doubling up in my head). With a confused stare on my face I did as she said and she proceeded to pull down on something on the back of my pants. Wildly grinning she handed me one of those long size-stickers. (I bought the pants last week, haven't worn them until today.)
How would you let a stranger know if you've spotted something like this?
(Another thing to ponder is that maybe the person left the sticker or the price tag or anything else there on purpose.)