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Continuity mistake: When Johnny gets scared of Stephanie's dog, he moves backwards and falls off the porch onto the ground below. His actual framework stays in the same position, but the tracks he uses to move around are strangely upside down. The tracks are made up of long black rectangles with curved edges on the top, but when we see Johnny lying down, the shaved corners are at the bottom. (00:36:15)

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Continuity mistake: Just after Stephanie's truck stops on the cliff edge, she gets out and goes to talk to Ben and Newton who were following her in their Nova truck. She goes around the back to talk to Ben, and sees him taking Number 1 out. In the first shot of here her arms are by her sides, but when the view cuts to a different angle, she has her right hang on the side of the van door. (00:45:25)

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Revealing mistake: Some shots used in the scene where Johnny runs from the Nova helicopter were shot using the small toy version of Johnny. There were no mountains in the area and a small version was filmed heading towards some big rocks with the camera on the ground to give the impression they were in a mountainous area. (01:30:15)

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Trivia: The main characters in this film are Johnny and Stephanie, and the film is directed by John Badham. In one scene, Johnny watches Saturday Night Fever on TV. The scene he watches, (and imitates with Stephanie), involves two characters also called John and Stephanie. Saturday Night Fever was also directed by John Badham. (01:02:20)

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Other mistake: When Johnny is changing his arm in the back of the Nova truck, it's quite obvious that the new arm he 'attaches' isn't realy attached at all. (00:51:50)

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Continuity mistake: As Johnny runs from the Nova helicopter his chest plate falls down, in the next scene, it's back up again. (01:31:05)

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Other mistake: The tree used to hold up Number 2 is very thin and weak looking, yet it supposed to be supporting a 400lb robot. Strong tree. (01:13:25)

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Visible crew/equipment: When Johnny is blocking Frank's gunshots with pieces of Frank's car, you can see the wires attached to Johnny's arms for the puppeteers to control him. In the last one, you can even see one of the puppeteers' hands. (01:06:25 - 01:12:21)

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Revealing mistake: When Frank takes the orange juice from the tray Johnny 5 is holding, the tray moves with the glass for a second. This is because the orange juice glass was glued to the tray, so Johnny wouldn't drop it. (01:05:25)

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Continuity mistake: Johnny flicks around the radio stations and tunes into 94.1 and there is some music - he tries another station and then comes back to 94.1 and it is already into the first chorus of the "Who's Johnny?" song. (00:54:25)

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Continuity mistake: When Number 5 gets out of the truck it is no longer hanging over the edge of the cliff. It has moved inland by several feet. (00:46:45)

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Continuity mistake: When Ben unloads Number 1 from the truck, it is almost fully erect, yet in the next shot, it is in a crouched position. (00:44:50)

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Visible crew/equipment: You can see a wire attached to the back of Stephanie's truck in this scene, which obviously stops it from really falling over the edge of the cliff. (00:43:20)

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Continuity mistake: The fence that Johnny falls against starts to break before he even touches it. (00:36:10)

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Audio problem: When Johnny starts to make impressions of advertisements he has seen on the TV, the TV magically stops making noise throughout this scene. It comes back on when Johnny has finished speaking. (00:34:50)

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Visible crew/equipment: Look REALLY closely at the mirror in the background when Stephanie is trying to control Number 5 from destroying her house. You can see a man leaning over in its reflection. Possibly the director or other crew member. (00:32:15)

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Continuity mistake: A cat is ontop af a boiling saucepan in Stephanie's kitchen, yet it seems to be rather comfortable. Brave cat. [It is dry ice in the saucepan, so all animal lovers don't worry.] (00:31:45)

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Continuity mistake: When Johnny is exploring Stephanie's house we see 3 shelves in the background and on the middle shelf is a grey cat. In the next shot there is a black and white cat in its place. (00:30:50)

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Continuity mistake: When Stephanie and Mrs. Sapeeto are talking after Frank leaves, we can see Stephanie's truck in the background with no Johnny 5 on top of it. (00:24:00)

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Visible crew/equipment: When we see a wide shot of Stephanie's truck driving through the town, look closely to the left of Johnny when we see the truck start to go up the hill. You can see one of the puppeteers hiding beside the robot. (00:21:35)

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