Alone

A person in a dark hooded jacket runs away from the camera through a curved subway tunnel with green and white walls and advertisements. The scene cuts to a close-up of a paint roller applying a white line to dark asphalt, followed by a shot of a person using a broom to sweep the line, then returns to the runner in the tunnel, now joined by two others, all moving away from the camera down the corridor. The sequence ends with a point-of-view shot from a moving train traveling through a dark tunnel at night, with blurred lights streaking past.