Other mistake: The van used by Cecilia to chase Tom should be damaged because of the crash, but it was not.
Other mistake: *Spoiler Alert* The strength of the underwater suits is wildly inconsistent. Rodrigo's suit almost immediately cracks and implodes, killing him. Paul's suit is easily ripped open by the creatures, also killing him, but Norah is repeatedly slammed into the sea floor by one of the creatures and her suit remains remarkably intact.
Suggested correction: It is stated by one of the survivors that one of the helmets was damaged. Rodrigo had the damaged one.
Actually, that's not completely accurate. She says something like "Faulty, I knew they were faulty." That also doesn't account for the fact that the creatures tore Paul right out of his suit, but couldn't seem to do the same with Norah.
His suit was faulty. He noticed a crack when he first picked it to put it on.
Other mistake: In the credits of the movie, the creator of the original comic's name is misspelled as "Bob Macleod" when it should read "Bob McLeod."
Other mistake: When Gary is about to test the trap check the bus door on the right: there's a reflection of what seems to be his shirt, but it's a long sleeved wrinkled shirt, not the short sleeved he's wearing. What's even more bizarre: when Gary moves around, the reflection stays completely still and, drumroll, a shot later, from the very same angle, the reflection disappears. Either it was a crew member hiding, or a CGI-made reflection placed to hide some unwanted crew or equipment reflection.
Other mistake: The rectangular area of skin cut from the dead deer's rear side was not wide enough (or at the correct angle) to encompass the killer's entire bloody hand print; it would have missed the "pinky" finger (and possibly the tips of the second, third, and fourth fingers). Because the fingers were spread out, a shape more like an inverted isosceles trapezoid (or a much wider rectangle) would have been necessary. (00:42:52 - 00:44:09)
Other mistake: In the climax Melanie throws the bomb from out of the water, but the bomb is not wet. (01:39:55)
Other mistake: The woman was impaled by two stakes, one through her chest and one through her right shin. The man pulled her out of the hole from the edge at an angle to her left side. From this position, he could not have initially kept her body parallel to the ground or subsequently pulled her up at an angle without causing additional injuries or death. (00:14:33 - 00:14:55)
Other mistake: Bo walks through the charred corn field, but her shoes do not get sooty. When she finds Eden's flower ring, the flower petals are intact, but should be burned beyond recognition. (01:25:18 - 01:25:39)
Other mistake: When the white mouse runs to save the brown mouse, he runs at normal speed, but the witches move in slo-mo for reasons unknown. (00:47:23)
Other mistake: Jude would not be able to write that neatly - especially that fast - while holding a floppy notebook in the air. The right half of the notebook was sagging while he wrote three perfectly lined rows ("I told you not to make him mad."). (00:46:03)
Other mistake: Jung-seok's nephew accidentally drops a ball which rolls away and lands in front of a nearby bed. When he walks over to get it, he realises that the man sitting on the bed has turned into a zombie. He is shown in a contorted position, with his back lifted off the ground and is heard making painful grunting noises. The other passengers in the cabin then realise there is a zombie in the room with them. It is extremely hard to believe that none of the other passengers in the cabin would have noticed this beforehand, not even by accident. This man's body was in a completely inhuman and unrealistic position, but it's not until the nephew walks up to him where people start to notice. (00:05:25)
Other mistake: The entire movie takes place during the overnight dark hours. Limited lighting from the car and flashlight somehow manage to illuminate faces, photos, signs, etc. Filming in the dark surely has its challenges, and there has to be a proper balance between lighting and ability of viewers to see what is happening. The "convenient" lighting would be a "deliberate mistake" except for one factor: A full moon (highly illuminated) is shown without radiating the light expected from a full moon. (00:26:25)
Other mistake: "Sally" the Great White Shark rammed Emma into a rock (or other hard object) underwater and Emma only got a small cut above her right elbow. It isn't clear how fast Sally was swimming, but Emma was rammed with force (and appeared to hit her back). A female Great White Shark weighs about 4,000 or 5,000 pounds, so Emma would be expected to suffer a major (not minor) injury under the circumstances. (00:05:24)
Other mistake: A crow crashed into a bedroom window, causing a small hole in it with radiating cracks. There was blood splattered around the hole as well as two long downward/ vertical lines of blood. Although it is possible for a bird to crack a window, it is much more likely that a bird breaks its neck without causing damage to the window. In the event that this crow did put a small hole in the glass, at least some fragments of feathers should have been stuck around the hole, but there were not any. (00:06:55)