When the sheriff first confronts Ian before the plate-glass window, many people can be seen walking down the street in the reflection behind Ian, yet there is no sign of them behind the sheriff in his shots.
When Ian is in the cage, the bars flexes as if they were made from rubber when he grabs them.
As Ian walks off at the end of the film the shadow of the camera and crew is visible on the ground briefly.
When the sheriff attempts to arrest Mr Harker, the microphone is visible for several seconds above Mr Harkers head.
(at arouns 51 mins) When Ian is shot, there is a boom mic that comes into the shot on Harker's one shot.
In the very first talking sequence in the cafe, a boom mic dips into frame for a second or two as the men are conversing.