floor  apartment and descends, seemingly without a cut, to the ground  level, out the buildings front door, and then to the opposite side  of the street. The interiors were shot with an overhead track in a  studio, and there is an imperceptible cut as a man passes by the  front door, carrying a sack of potatoes. This is subtly blended into  a new shot of the camera pulling away from the building exterior  that was actually used on location.