Other mistake: The catapult on the battlements Jean uses to evict the castle guards is rather curious. First, there is neither a bow nor any torsion to 'power' the weapon, and secondly it just seems to cock itself, right after each shot. All that Jean does is pull the lever and none of her diminutive helpers stand by for any cocking work whenever the catapult arm is shown.
Other mistake: When Doc, Marty and Jennifer have arrived in 2015 Doc tells them that the time of the day is 4:29pm. However the destination time is still shown on the time circuits' display from their time travel to the future - the two times should match, but the destination time has the bottom AM/PM light illuminated, while the current time has the top one lit. They didn't arrive or leave at 4:29am, so something's wrong somewhere. (00:04:42)
Other mistake: Towards the beginning of the film, the teacher counts 19 students then says one is missing, implying there are 20 (including Mike) However, Mike ends up being paired with the teacher, despite there being an even number of students and therefore everyone should have a partner.
Other mistake: When Milo is practising his speech, he jumps over the blackboard to answer the phone. The top of the blackboard rests on the desk, but when he slides back over, it swings all the way round . If it hit the desk one way, it would have hit the desk swinging the other way round.
Other mistake: When Anne goes in for her second day of teaching and there's the illustration on the board, you see a view of the girls and an empty seat in front of Emiline. When the camera goes back, there is Jen Pringle sitting in it, and it happens again where Jen is sitting in the seat. A moment later, Jen walks into the classroom late and sits in the 'vacant' seat right in front of Emiline.
Other mistake: During the musical auditions, the pairs audition doesn't start until halfway through the auditions. But the disturbing dancers were a pair audition and Ryan and Sharpay were the only pairs.
Other mistake: When Butch says "Welcome to HQ", his mouth isn't being animated.
Other mistake: When the gang are watching the news report in their van, Heather Jasper-Howe shows the clip of Fred saying "I think Coolsville sucks" - problem is that there was not enough time for the crew to edit Fred's short interview and be able to transmit it that quick. (00:37:00)
Other mistake: Just before the second period against the USSR, we see a couple of shots of the benched Soviet starting goaltender Vladislav Tretiak. His hair is dry and combed, and there is no sign of perspiration, despite having just played the whole first period. After the game is over, we see a shot of the Soviet players watching the Americans celebrate. This time Tretiak's hair is wet and his face is sweaty. Shouldn't it be the other way around (i.e., hair is wet after playing one period, then dry after sitting on the bench for two periods)?
Other mistake: When Paul is making the DVD, there's a record of Terri performing a song she wrote(One more mile to Jericho). At the very end, outside the school the kids start play some music together with Terri singing. That's supposed to be some random thing like it was before, but actually they play and sing Terri's own song. How come?
Other mistake: When the cleaning crew is leaving Joe's apartment, you can see a green Oreck commercial vacuum. The handle is on backwards.
Other mistake: During the opening credits (right after the fish chopping shot) two bearded gentlemen meet in the street. As they part, Lord Barkis suddenly appears behind them. But where did he come from? He didn't walk in from either side, we would have seen him. Nor was there any door he might have come through.
Other mistake: When Margalo lands in Stuart's car after escaping the Falcon, Stuart slams on the brakes, only he hits the gas pedal instead of the brake.
Other mistake: As they're chasing the giant fish and the ship is bouncing on the waves, we can see in some shots a major design flaw - the ship has no rudder.
Other mistake: In the last battle scene, the same death is shown twice. Just before 1h32, a Magisterial guard slumps towards the left foreground, his daemon bursting into dust from the right; and two minutes later just before 1h34 the same piece of footage is shown again.
Other mistake: When the agent shows the spiral for the pattern of the messages, the spiral goes through South America and America. But the agent, before, showed two messages that aren't in the pattern; one in England (Stonehenge), the other in Cairo, Egypt.
Other mistake: The kid that plays young Lou Gehrig later reappears when Ma finds out that Gehrig signed with the Yankees.
Other mistake: When Jordan Cahill sings on the porch of the old house, he is holding the guitar but he is not actually playing it (he's not really fingering on the fingerboard).
Other mistake: When Shane crashes the car through a fence (or wall), it appears that the car sustained absolutely no damage on the front (or anywhere else as far as I could tell). Later, there seemed to be very little damage to the car as a result of a chase scene where the car hit things, just a relatively minor scrape or two.
Other mistake: Right at the beginning of the movie, when Lewis's real mum picks him up from the box and hugs him, it's no more than three seconds before she hears Lewis from the future slipping on the step. She gets scared and puts baby Lewis back in the box. When Wilbur takes Lewis to meet his mum, near the end of the movie, the time his mum holds the baby is more than twenty five seconds.