Revealing mistake: An enraged Cheetah almost literally mops the White House floor with Diana flailing her around with the lasso. Wonder Woman is sent back first into a pillar, which disintegrates from the impact. Very good, but not so good is the other piece of pillar that comes down and bounces like rubber by her. (01:51:45)
Revealing mistake: When Ava holds a knife to the gambling woman's neck, you can see the plastic knife bend.
Revealing mistake: During the dance number in the airport, Santa grabs a security guard who then starts break dancing. It's obvious this dancer is a stunt double as he's younger and skinnier than the real guard.
Revealing mistake: Emmet held a cigarette lighter, displaying a fairly high flame for a long period of time and even held the lighter sideways in his palm without burning his hand! If it were a real flame, he most certainly would not be able to hold it lit very long and would have burned his hand. (00:24:25 - 00:25:25)
Revealing mistake: When the Protagonist and Neil are walking through the Freeport area whilst the plane is being hijacked, just after the worker fills in the numbers on a keypad and opens the door to the vault, he walks through and is followed by Neil. The Protagonist is shown holding a small cup of espresso and briefly looks around before walking in with them. The interior of the cup can be seen when he does this, and there is no liquid inside of it. (00:40:12)
Revealing mistake: After "Yoga Pants" unlocks a man's mouth gag, the man starts to unlock hers. Yoga Pants bends her head down and the metal rods in the mouth gag expand and slide out of her mouth before it's unlocked. She pushes her mouth gag back in place until the man removes it for her. (00:12:37)
Revealing mistake: When Devil Face cuts J.D's arm the knife's clean. (00:52:47 - 00:53:10)
Revealing mistake: The location of and distance between windows on the mobile home should stay the same, but do not. The home's exterior is constructed of vertical boards/slats, which can be used to make a rough estimate of the number (then distance). Initially, there were about 24 vertical boards between the shortest window and the window to its right (on-screen). When David and Anne were close to the house, there were a lot more boards between these windows - closer to 36+. The mobile home was "fabricated". (00:02:18)
Revealing mistake: When the Grand Witch floats, she casts no shadow on the stage. (00:39:58)
Revealing mistake: When Cecilia is lifting an iPhone up to her ear, it starts ringing as if she's making a call. But on the screen, you can very easily tell it doesn't say "dialing" or "calling" - it's a timer showing how long the call has been going on. She was already on a call before pretend-calling. (01:42:47)
Revealing mistake: Clearly not Vince Vaughn during the opening kills as the Butcher seems leaner than Vaughn.
Suggested correction: Seems leaner" is just far too vague to be a mistake, and I didn't see anything that made me immediately think he was "clearly not Vince Vaughn.
Revealing mistake: The Uber car's instrument panel did not appear to be functional (indicating it was fake). On the driver's side, the numbers in the two large circles were not discernable, but one had to be the speedometer. On the left side, the arrow pointed to maybe 6 MPH, even when the posted speed limit was 60 MPH. The gauge on the right side stayed at the bottom of the left side at zero. (00:09:50 - 00:13:05)
Revealing mistake: When the (imposter) female security guard was lying on the floor with her head slightly raised and shot herself, the gun was about parallel to the floor; the blood splatter should not end up primarily mid-way up the wall like it did. The floor-level view of the dead guard shows a reduced-size wall so that the blood splatter looks much closer to the floor than it was. Also, at least some blood should be visible on the guard's temple but none was. (00:35:40)
Revealing mistake: The green screened scene behind the ticket collector on the dock isn't moving. The waves on the water are paused, then the background is moving again in the next scene. (00:08:00)
Revealing mistake: When Maya Rudolph and Tim Meadows are in their car at the drive-in theatre, whilst Maya Rudolph says "We got Hubie Dubois spying on everybody", there is a close-up shot of the wing mirror with Hubie's car reflected in it, along with several other cars and a building in the background also reflected. Despite being a reflection, any text or numbers reflected in the mirror are not reversed. The number plate on Hubie's car is spelled out forwards, and the sign "Salem Drive In" on the building in the background is spelled forwards also, and not reversed as they normally would be in a reflection. (00:49:17)
Revealing mistake: As impressive as the CGI lions were, there are almost always giveaways. For example, when Fareeda calls Charlie over and goes to hug him, her left hand and forearm quickly disappear into his mane and go too far in to be realistic. There is also a small but noticeable gap when Charlie's right paw is curled over Fareeda's left shoulder. (00:18:45)
Revealing mistake: Throughout the movie, there are mixtures of real snowfall and artificial flakes. When John is at Paul Carnury's house, in particular, the "fake" snow is quite apparent. John could be standing outside in the snowstorm yet little or no snow hit his jacket. (At one point, a few flakes land on top of his head.) When John breaks through the front door, a gush of "flakes" come inside and the ones on the back of his jacket fly and/or roll over his body. "Snow" even bounces upwards off his jacket. (01:13:34)
Revealing mistake: In the opening pre-calculus class, Mara bending over to the side of her desk is what enabled her to avoid being splattered when Kaitlyn - sitting in front of her - "exploded." It was also a cue that the "blobs of blood" were about to be strewn across the classroom. The boy seated at the last desk behind Mara moved his right hand up to his forehead (similar to how one would block sunlight) in anticipation of getting splashed with blood. After some of the "blood" landed on him, he quickly moved his hand away from his face. (00:00:35)
Revealing mistake: Near the beginning of the movie, there does not appear to be a curtain (or window) on the left side of the screen (e.g, when Samantha is sitting on the couch), but there is near the end when Chloe enters the now-empty room. The use of a green screen seemed apparent throughout the movie. (00:04:19 - 01:23:04)
Revealing mistake: Vic jumped onto the roof of the white van while it was moving. The van driver started weaving to get Vic off the roof - but Vic could not be seen at all when there was a front view of the van. Even if Vic were lying on the roof, at least part of him should have been visible. (01:04:04)