Visible crew/equipment: After Roger shoots the Witch, when Harold goes to his window he sees Roger's shotgun and calls the police. In the next shot, as Roger kneels beside the body, we can see the black screen equipment on the porch, on the left side of the screen. (00:46:05)
Visible crew/equipment: After the gardening tools attack Roger in the shed, when Roger loads the shotgun to confront the marlin mounted on the wall, just as he enters the room and stops, the boom operator's raised arm is visible on the left side of the screen. (00:43:45)
Continuity mistake: While Roger is trying to get away from Skeleton Big Ben he's wearing his army boots, but when Roger is walking on the roof of the house, the footwear of the stunt double looks nothing like Roger's army boots. (01:23:20)
Visible crew/equipment: After Roger has a Vietnam flashback while he's at his computer, the movie playing on the TV catches his eye, and he watches for a moment, then when he clicks it off we can see the reflection of equipment and crew on the dark blank TV screen. (00:25:55)
Revealing mistake: While Roger is in the bathroom he hears banging, and when he opens the door he sees the gardening tools poised to attack, and in the shot from the bedroom facing Roger, we can see the stunt wires attached to the hedge shears as it hovers in front of the door's wood casing. (00:44:35)
Revealing mistake: About 27 or 28 minutes into the film, right before the giant creature flies out at Roger through the doorway, you can see the wall (part of a film set) "wobble" for about a half second as Roger opens the door.
Answer: That's the horror movie Don't Look in the Basement (1973), at its own timecode 01:09:30 within that movie.
Super Grover ★