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Continuity mistake: When the police come and suppress Blockapalooza, the letters on the police van's license plate keep disappearing and reappearing. (00:13:40)

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Continuity mistake: After Mayor Dixie reclaims the neighborhood as a national historic landmark never to be torn down, Phil and Bob go to pick up Arnold and Helga. In the next shot, the people standing around them change position. (01:07:42)

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Audio problem: When the bus is heading towards the bulldozer, Arnold and Helga start to scream. They then close their mouths, but their screams can still be heard. (01:06:05)

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Other mistake: When Bob and Nick start fighting, Nick runs into the kitchen and grabs an egg beater. Right before he tries to attack Bob with it, his right shoulder is drawn incorrectly. (00:49:32)

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Continuity mistake: When the bus is about to jump the ramp, Arnold is on Gerald's left, and Helga is on his right. As the bus runs over the ramp, Helga is missing from the bus, and Arnold is on Gerald's right. While the bus is in the air, Helga reappears, and she is standing where Arnold originally was. When the bus lands and keeps driving, there is one shot where Arnold is missing from the bus, then he reappears, and he and Helga are back in their original places. (01:04:42 - 01:05:22)

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Revealing mistake: When Helga tells Arnold that she likes him a lot, as Arnold says, "You do? You did this for me?", his mouth disappears for one frame. This is easier to see in slow motion, but it's still visible at normal speed. (00:57:26)

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Continuity mistake: When Murray says, "We got a neighbourhood to save," Arnold is standing on Helga's right. Then when Murray speeds up the bus, they switch places. There was not enough time for them to switch places. (01:00:24)

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Other mistake: When Arnold says that he needs a VCR to show the tape, and the camera moves over to Bridget, her appearance is way off: the yellow and gray pieces are missing from her belt, her collar piece is missing, her boots are just dark brown instead of light brown and dark brown, the lines on her suit are not drawn in, and the VCR and zip line device are not in her hands. All this stuff appears in the following shots. (01:07:05)

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Continuity mistake: When Bridget uses her zip line, Helga's arms are folded, and Gerald is standing next to her. In the next shot, her arms are down, and Gerald is standing next to Arnold. (01:07:19)

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Other mistake: When Helga kisses Arnold on top of the FTI building, Arnold's hat falls off his head, but you can see another hat on his head as the other one is falling. (00:58:02)

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Revealing mistake: When Arnold asks Bridget how much the equipment costs, as she says, "It's on the house," her eyebrows disappear for one frame. (00:36:35)

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Other mistake: When Bridget tells Arnold and Gerald, "If you're gonna try and save the neighbourhood, you're gonna need some equipment," Arnold's right eye duplicates. (00:35:55)

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Continuity mistake: When Bridget shows Arnold and Gerald the equipment, there are purple binoculars on the table. Later on, when she shows them the watch, the binoculars are brown. (00:36:19)

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Continuity mistake: When Bridget is presenting the equipment to Arnold and Gerald, there is a close-up of some walkie-talkies, but they are never visible on the table in any other shot. (00:36:16)

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Continuity mistake: When Bridget shows Arnold and Gerald the equipment, there are purple binoculars on the table. In the next shot of the table, they disappear. (00:35:58)

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Continuity mistake: When Arnold and Gerald are standing in front of the City Morgue, the design of the doors changes between shots: handles appear on the panels, extra panels appear, and the top panels become square-shaped. (00:26:42)

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Continuity mistake: When Arnold and Gerald are standing in front of the City Morgue, there is a lantern next to the doors. In the next shot, it moves further down. (00:26:39)

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Continuity mistake: When the head of security carries Arnold and Gerald into Scheck's office, there is nothing on Scheck's desk. Later on, Scheck goes to his desk and picks up a glass full of cherries, which wasn't there before. (00:31:36)

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Continuity mistake: When Scheck closes the doors to his office and starts talking to Arnold and Gerald, there are no locks on the doors. Then, when Arnold says, "I'm Arnold, and this is Gerald," a lock appears under the left door handle, then disappears. (00:31:41)

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Revealing mistake: When the head of security carries Arnold and Gerald into Scheck's office, as the camera zooms in on Scheck, one of his buttons disappears twice in two frames, and his other button completely disappears mid-shot. (00:30:18)

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