Partly due to having a ripped kick seam, I entertained a whole room full of people during a discussion of the film Boys Don't Cry. Interestingly, none of my "friends" mentioned my problem at the time though one did say something while I was in the middle of the street walking to my car. I've never fully lived this down of course.
I have a friend who took a dress to get it altered. Between the kick seem and the length, her ass was on display for a long time before it was pointed out.