Factual error: The delivery van bringing gear for the walk has a 718 area code on it. That area code did not exist until 1984.
Factual error: In the fighting scene in U-Bahnhof Alexanderplatz the underground trains move much faster than in real world. Alexanderplatz is a railhead station. The trains would either crash into a wall or would not have enough room to accelerate that fast.
Factual error: The producers took a lot of pride in using period-accurate furniture and clothing. But the family's house and furniture aren't remotely accurate for their actual situation. The table, the chairs, the house with a sleeping loft - all those took technology and manpower that they didn't have, and we've already seen that they had nothing to trade either. And they have more furniture than could have fit in that wagon.
Continuity mistake: As Jake and Olivia steal a car while their enemies are shooting at them, we see a rear-view mirror. A few seconds later, Jake turns to check if they are followed, and the mirror has vanished. As they reach the safe house the mirror is back. (00:19:55 - 00:21:30)
Continuity mistake: When Griffin gets out of bed, when he hears the clown song he pushes the bed sheets forward about 3 feet from the pillow but when his dad goes into Griffin's room, the sheets have been pulled up about half that length.
Continuity mistake: When Peter Pan is fighting the tribe's Pan on the trampoline and they're just about to finish Peter Pan off, the elder chief calls for the fight to stop. Peter's arms are above him in the overhead shot but are outstretched in the view from behind Peter.
Deliberate mistake: In the opening, the kids are looking up at the floor boards. Uniform light seeps through, but as it turns out, the house was small and swarming with an angry mob carrying torch. The light is not really compatible with that scenario, and in fact when the scene is shown later again, the lights are warmer and you can see the torches flickering. It's most likely a trick not to give away exactly what was hunting the kids in the basement. (00:01:00 - 01:11:20)
Factual error: At the beginning of the movie, Jason Sudeikis pops out of a door wearing a Jurassic 5 T-shirt. Problem is, the artwork on it is from the cover of Feedback, their 2006 album. The scene, as the introductory caption says, is supposed to happen in 2002. (00:00:55)
Visible crew/equipment: When Davis comes out from the train with the headphones on in the subway just before starting to dance, a cameraman filming the scene can be briefly seen reflected on the train door's glass. (01:08:00)
Factual error: A band poster for the Polish blackened death metal band Behemoth is shown while Bruce drives around the town, however the poster features the band as they are in 2015 while the film is set in 1990.
Continuity mistake: The first time we see Roland on his own at the bar, he's talking with the bartender, Michel. When he asks Roland in French where his wife is, Niels Arestrup's arm changes position instantaneously in an edit mid-sentence, and does the same a couple more times after. (00:11:30)
Continuity mistake: Depending on day or night, the size of the Christmas tree changes in height and fullness.
Continuity mistake: After Ben stopped his car in front of Carter's house, a front view of the windshield did not show either of the shattered sections from the earlier collision with the deer. Damage was first on the driver's side then on the passenger's side, but now on neither side. (00:15:55)
Character mistake: In his opening prologue, Burt says the Graboids have been contained to the Northern Hemisphere, showing a map highlighting the Graboid attacks of the first film in Nevada and the second film in Mexico. However, it overlooks the Graboid/Shrieker attack in Argentina, in the Southern hemisphere, shown at the beginning of Tremors 3, an incursion Burt personally put down. It's not like it was classified - characters in that movie talk about it being reported by CNN, and characters in the Tremors TV series talk about it as well. And it's not like Tremors 3 is no longer canon, since Burt makes two references to being swallowed by the Graboid in that movie (which also becomes a plot point in Tremors 6).
Continuity mistake: Right at the beginning of the movie, the Sergeant pulls his jeep over and headbutts a prisoner who is carrying a Danish flag, seizing it. In the following shot he has his arms open and shoves away another prisoner, no flag in his hands. Next shot, he's standing by the bleeding prisoner, folded flag in hand. (00:02:25)
Continuity mistake: In the locker room scene after Tony injures his knee, Tony walks outside the room crying and he then throws his helmet against a wall, causing the chin strap to fall off onto the floor in front of the the doors. When the coach walks in through the door, the chin strap has disappeared. When the coach and Tony hug, look just behind the coach's right arm. You can see a quick glimpse of the chin strap back on the floor where it was before.
Other mistake: The town is Mt Barker. The red and blue ribbons on the sheep pen say Mt Baker.
Factual error: There are several scenes in a field of barley. Tramlines are seen. Tramlines in crops were invented in 1975 to allow tractors and sprayers to drive up and down fields. Sunset Song is set around 1914, 61 years before tramlines were invented.
Other mistake: The protagonist is reading the booklet illustrating the wonders of his home. Something strange about it; the paragraph by the title "State of the art lift system", with a big lift icon to the side, has merely the first couple of lines talking about lifts, and then moves on, without any transition, to the subject of pets, adoption and all related matters. (00:03:35)
Character mistake: The protagonist is reading the review of his book "Bitter Tulips." The influential literary critic publication apparently has zero proofreading, since the article says that the novel "can be described as AN failed experiment." (00:45:00)