It just slipped out...

It was one of those moments where I was thinking it and thinking it and thinking it and then suddenly realized I had actually spoken.
Brad and I went to see The Invention of Lying. The theatre wasn't very busy, but there were a few crowds of people scattered around, inluding two groups of teenage girls. They were giggly and a bit disruptive a few times but very briefly so I wasn't terribly bothered. Towards the end, however, I suppose their little girl brains became bored with the movie and they started making comments and laughing and talking quite loudly. I was becoming more and more annoyed and thinking ...well, a number of things, but the main one that kept resurfacing was "You're not at home; please be quiet". It went through my thoughts again and again and suddenly I realized that I was hearing myself actually saying it out loud in the theatre. The talking stopped immediately. I did see one head in the row in front of ours turn around and glance at me, but she didn't look like she and her friend were part of the crowd of adolescents. I wasn't sure though, if she was looking accusingly or not.
After the movie though, she and her friend came up to me and thanked me for speaking up. They said when the girls sat down in front of them she had said to her friend "oh great, we're behind the dumb blondes who are going to talk the whole time" and that they were glad I said something.
Brad said later he was a bit shocked when he heard me and I admitted I was too. At least I was polite and said "please".