You are a clear-seeing, Royald. She appeared suddenly blocking the view of two girls chatting behind her, and creating a moment of confusion for we all. She felt guilty and untimely, I guess. This is maybe the interest of this shot. You get it.
I can imagine this lady's inner thoughts:
"Why is he taking my picture? What?
What do you mean behind me? Oh, I'm sorry I blocked his shot.
What's the matter, why was he taking HER picture and not ME?"
