Just reading through some older threads here today, and found this one. Although this is a couple years removed now, we had an experience of "people who don't belong" at the movies. We went to see Clerks 2 at a matinee showing back when it was released, and saw two women - aged 70+ - walk into the theater. We figured "they must be in the wrong theater", and guessed they would leave shortly after seeing the opening credits. Well, they stayed about half way or 2/3 of the way through the movie before getting up, gesturing at the screen, and saying "eeeeh" and walking out. It was pretty funny. Probably about the last movie I'd expect to see two older women at.