10
I love when someone interacts with the photographer. Here, she just happened to peek over, almost like she was trying to figure out where that mysterious song was coming from, and BAM, you're there snapping away.
I like this a lot because the lady caught you out - there's something about the acknowledgement of the photographer in otherwise candid photography that I like. It gives me a sense of interaction, which is so lacking in society. To me this shows this lack of interaction well.