Continuity mistake: At the beginning Ava shoots the man's phone out of his hand through the car window. When the car drives away all the windows are intact.
Continuity mistake: When Kat and the protagonist have dinner, his hands swap between crossed or not depending on the shot. (00:28:32)
Other mistake: The van used by Cecilia to chase Tom should be damaged because of the crash, but it was not.
Factual error: The "hard suits" the divers wear have soft, relatively normal gloves and soft joints. More akin to a football uniform with armor over spandex. They are at the bottom of the Mariana Trench, at 36,0000 feet below sea level. The pressure is over 7,000 psi. Without a hard suit, they would instantly be crushed.
Continuity mistake: In the intro, the woman shimmies off her shirt, which pools on the bathroom floor. She finds the obligatory corpse, screams, and gone is the shirt from the floor. (00:02:00)
Continuity mistake: Anne Heche's jacket changes color from brown to pink, and her wool hat that had blood and coffee on it, is back on her head after being thrown away. (00:40:00 - 00:44:00)
Deliberate mistake: The "flow" from Fred (Rachel's brother) urinating while strapped to a chair was not what would be expected. His pants would absorb the urine, so urine would not flow to the floor like from a faucet or large streams drip straight down and form a puddle beneath him. (00:57:06)
Continuity mistake: At the market, Lee picks out five pieces of fruit (one apple and four oranges?), tears a produce bag off, and walks away. He takes a few steps off-screen, and he is next seen going around an end cap and walking down an aisle, with nine pieces of fruit in the produce bag. (00:01:36)
Continuity mistake: SPOILERS: During the final scene, when Samuel L. Jackson is "puppeted" to lift his arm up to make it look like he's pointing a gun at the SWAT team, the number of laser-sights visible on his chest changes between cuts. In the wide-shot, there's only three, but when it punches into a close-up, suddenly there are five.
Factual error: Smaller pieces of the comet start raining down in a highway setting. While small fragments of a comet can come down, they'd all be traveling at anywhere between 20 miles per second as the comet is an extra-solar comet. Those small pieces wouldn't make such piddling explosions, they'd be creating concussion waves that would rupture your organs and send vehicles flying. The heat even from those small rocks would ignite all foliage within 50-100 yards. (01:31:00 - 01:34:00)
Factual error: The Corvette owned by Bentwood is not a Z06 as shown in the movie. It is a 2014 C7 Stingray and can be identified by the Stingray logo on the side of the car.
Factual error: SPOILERS! While the ending of Al being arrested for murder at his own wedding is dramatic and cathartic, it wouldn't have happened that way. There's no way that the cops would have known to search the wooded area near the cabin; they would have needed to find physical evidence linking the cabin to Al; they would have needed to establish that Al had no alibi for the time in question; etc. None of that would have happened that quickly or that quietly.
Factual error: The USMC Embassy Guard is an enlisted Marine Sgt. He is wearing a Commissioned USMC Officer's cover (hat) that has gold braid and gold oak leaf motifs on the visor. (01:20:15)
Factual error: The soldiers had 506 Regiment's helmet markings of the 101st Airborne, and on their sleeves the 82nd Airborne and 1st Division shoulder patches.
Other mistake: The Volvo the woman is driving has a front Oregon license plate numbered 643 ODS, but her rear license plate is 902 CSM. (00:02:55 - 00:03:45)
Visible crew/equipment: While on the Genesis, when Robin finds Frank she asks if he's bulletproof, then Alpha 5 contacts ops to open hatch 26, and as Frank and Robin walk over to the monitor, a white T-mark is visible on the floor. (01:20:40)
Visible crew/equipment: The diner flashback has possibly one of the worst handling of extras ever. The lady behind Crystal Fox keeps glancing at the camera and playing with her food in very unnatural fashion, but it's the guy with glasses behind Mehcad Brooks that truly shines; throughout the scene he drinks from an empty glass and, even more obvious, eats invisible food from his fork, usually throwing a glance right at the camera every time he does so, looking like he's about to crack into a laugh at the absurdity of it. It's such a bad performance that one really wonders if he was trolling Tyler Perry or something. (00:32:25)
Continuity mistake: When the girls are standing on the beach with the flares to guide in the German aircraft they are in two rows just a few metres apart. The view from the aircraft shows them much further apart, wide enough for the aircraft to land between them.
Continuity mistake: The characters are on a tile floor that has one yellow tile visible among the black and white tiles. The next shot they're in a different spot on the floor with two yellow tiles visible. (01:22:10)
Factual error: The Blackledges' car has a license plate that starts with 34. Montana uses the first two numbers on their plates to identify the county that the driver lives in. 34 is the number for Sheridan County which is in northeastern Montana where there are no mountains in sight, but the Blackledge ranch is set near the foothills of a mountain range as you would see in western Montana.