Revealing mistake: The rhino that killed (or "erased") Paul was obviously CGI and quite fake-looking, especially the way it was running. (01:32:50)
Revealing mistake: The front and rear views of the house did not seem to properly fit together. The rear view showed more sections, making the house longer than what the front indicated and had three high chimneys compared to only one from the front. The rear view also showed several trees that would be aligned in front of the house, but the trees did not appear to be situated that way. (00:27:49 - 00:29:52)
Revealing mistake: The 50 dollar bills that appear in the opening credits all have the same serial number (and you can find online the texture they used with great ease, just like the one for the 20 dollar bills stack). (00:03:45)
Revealing mistake: An exterior view of the damaged building was shown after Orlando's chair bomb blew through the 10th floor windows. The damage from the earlier explosion on the 4th floor could be seen in the lower left-hand corner. However, there were only two floors between the damaged floors [putting Orlando on the 7th floor] when there should have been five. IF the 4th floor was actually the 4th floor, there were not enough floors above it for the bank to be on the 12th floor. (01:20:44)
Revealing mistake: The "snow" that Kip and his friends jumped into after leaving the bath house was obviously fake (like the "snow" on the pine trees). Beads of "snow" do not fly into the air when impacted by a weighted object, such as a body. (00:22:32)
Revealing mistake: The front view of the pirates in the golf cart with Darcy and Tom does not show the driver turning the steering wheel at all, which would mean the road was straight, but the when the road becomes visible again, it is diagonally behind the golf cart. (00:36:45)
Revealing mistake: The very first shot of the movie, supposedly of Anya Taylor-Joy lighting a cigarette, does not match the following shot on the pier; the cigarette appears to be black and with a brand sleeve instead of the normal one she is smoking. The background confusingly looks more like an interior than the pier she is standing on, and the lighter is a common Bic-style one instead of the Zippo she is using also later in the movie. That's because it's actually stock footage. You can literally find the clip yourself on Shutterstock and similar websites, by the description "Close-up of the silhouette of a woman's face sticking a cigarette into her lips, igniting her with a lighter, and exhaling smoke. The grim concept of the harm of smoking in a low key." (00:01:00)
Revealing mistake: In the underwater view of the fish, the ice hole is almost perfectly round and the ice appears to be quite thin - nowhere near the several inches Jason and Ben have to chip away to reach water. (00:33:55)
Revealing mistake: Christine closed her dead brother's eyes without actually touching them. Christine had an open hand (no cupped palm) with her fingers straight out and together; her pinkie finger touched her brother's nose, meaning her other fingers would have been too far away from his eyes and unable to make contact. (01:11:03)
Revealing mistake: When Danny follows Maria outside, he is in front of a well-lighted wide patio door with side windows and there are numerous decorative lights to his right. Thereafter, close-up views of him talking show only some small red lights to his right; the rest of the screen is black. Wide views continue showing the lit entryway behind him. (00:08:44)
Revealing mistake: A dog would not be able to jump through a vehicle's window and land on shattered glass covering the rear seat without getting its paw pads cut. The shattered "glass" that Lulu was standing and sliding on appeared to be ice. (01:07:29)
Revealing mistake: The views to the right and left of the truck on the road did not flow in the manner expected if they were actually there (as opposed to using a green screen). Also, as soon as a "stop" sign could be seen to the right, the camera shifted to the driver, who kept driving as though the stop sign was not there. The structures to the right of the truck were blue but became white when the camera shifted to a front view (not using a green screen). (00:01:20)
Revealing mistake: During the scene with the ships hanging from the helicopters, Nate decides to fire a cannonball at the other helicopter as it's coming towards them. A standard cannonball shot from a 36 pound cannon that the Spanish used on their ships weighs 16.5 kilograms (the weight of a large full water dispenser bottle) but Nate tosses it around like it weighs nothing.
Revealing mistake: Robert's upper body is leaning against a pillow with his adjustable bed at about a 60° angle, and stays at this angle when there are front views of him. After Paul arrives, views of Paul that include only part of Robert's stomach/torso show Robert lying at a lower angle, closer to 45°. Sometimes, the blanket representing where Robert's stomach would be is all that is included. Robert [Bruce Willis] probably was not present when front views of Paul were filmed. (00:25:09 - 00:25:33)
Revealing mistake: When the boulder rolling down the hill hit the man, he "vanished" - he was not flung into the air and it did not look like he got run over by the boulder. [Poor/ineffective CGI]. (00:31:55)
Revealing mistake: Max rolled down the front passenger side window and no wind came into the car, but when he had his face barely out the window, his hat blew off (not shown on screen). If wind hit the visor part of his "bugout" hat, the hat would have most likely blown off into the car. (00:03:40)
Revealing mistake: Initially, there is a little movement that can be seen in the passenger's side mirror on Juan's car, but it is subsequently reduced to still-frame. Also, the driver's side mirror is tilted upward, showing movement, but not in a typical position to enable viewing of vehicles behind the driver. (00:00:55)
Revealing mistake: Nitro, a large Saint Bernard, was riding in the car with sun shining on his head from the sun (or moon) roof and was panting heavily. The absence of "slobber" - or any visible wetness on his tongue or in his mouth - gave him away as CGI. Other indicators of CGI include Nitro's limited and stiff movement and his left shoulder/upper left front leg partially covering the driver's shoulder but not interfering with his ability to drive. (00:21:38)
Revealing mistake: This happens in the second ceremony when Wolf didn't press the button to shut off the lights to steal the golden dolphin because of the good comments. Few seconds later, the lights shut off, and you can see that the meteor on the top disappears at the time.
Revealing mistake: At the hangar junkyard, there were a few 5-gallon gas containers around several "flammable" barrels that The Thief shot at in order to ignite/cause an explosion near Temple's goons. The huge explosion engulfed the whole area, but seconds later it could be seen that the flames were confined behind or within the circle of barrels and the gas cans were not affected. (01:13:10)