Continuity mistake: When Bob is in the coffee shop waiting on the call from Dr. Marvin he chases an older man away from the phone. The rope for the fish jar hanging around his neck is twisted around once or twice. The camera cuts away from him then back to him and then the rope is twisted around seven or eight times. (00:27:15)
Continuity mistake: Leo Marvin is at the window watching Bob 'leave' and he is holding the newspaper in his left hand. Then he waves and it is still in his left hand. When he walks towards his family it is in his right. He could have switched, but that is some pretty fast switching.
Continuity mistake: As the camera crew drives away, the shadows on the driveway change dramatically when the family starts walking back up the steps.
Continuity mistake: When the camera crew leaves, the Jeep is in the driveway. However, when the camera crew arrived at the house, the Jeep was not there. Look between the arriving crewmembers as they walk up the steps to see where the Jeep is eventually parked.