What I like about this photo beyond the facial expressions and conveyed emotions of the characters are the lines of the building and the design, texture, and color of the drapes in the background. They almost become a backdrop for the drama that's going on in the street before them. The way that the sunlight is also hitting the upper part of the building, and not the lower part, is also a little bit dramatic (tempers flaring!) - and I think, interesting as part of the design, and balancing.