The amazement stare
The people on the right do have an amazed, sad, anxious look on their eyes. I believe it's the inadequacy that the character on the right produces... The way he merges with the evening mood, the way he is walking with a strange air... like he is far away from the elements which produce the perspective, and they are right there... I think they are bothered, uncomfortable by the way the person in the right isn't walking amongst them, by the way he doesn't seem to be in the same place. And they cannot pull away, hence the closeness to the perspective, and to the viewer.