I love the way that the camera can capture images that the eye can't really see. The exposure is long enough that people moving across the shot appear blurred, but some standing or pausing are frozen fairly clearly. The man in the foreground turned to look at the camera, conscious that he was in the shot, but not enough to stop.
The over-exposure removes the definition from the outside world, although the odd person here and there is still visible in the distance. There are almost no objects in the shot so it becomes all about the people and what the viewer imagines about them.