(at round 1 min) During Rod Serling's monologue, people come and go through a revolving door. One lady exiting the building slows the revolving door by putting her hand through where the glass pane should be.
When Hall is driving and thinks someone is in the back seat, the steering wheel is in the wrong position. The metal ring on an old car's steering wheel is for the horn and should be at the bottom when going straight. For the entire scene it was at his 3 o'clock, meaning he was in a constant left turn.