(at around 3 mins) When Karen (Gloria Grahame) picks up Stevie (John Kerr) on a bridge in her '54 Ford Country Squire "Woodie", the rear tailgate window is open (up) when she arrives, stops, backs up, and Stevie gets in the front passenger seat. The next, more distant camera shot shows the vehicle exiting the bridge, and the tailgate window is clearly closed (down).
When Karen (Gloria Grahame) storms into her bedroom and kicks off her shoes, she apparently launches the first one over the walls of the set, as it shoots straight up toward the supposedly low ceiling but never comes down.
When Dr. McIver goes to leave Inch's place after arguing with her, a shadow of the boom microphone is visible moving on the curtain to the right.