Factual error: When Don records the flight log, he says that they have been in the storm for 5 hours. That does not seem to match the timing of the events in the movie, but on top of that, it's a Vegas-Phoenix flight. That's a 250 miles distance that would take little more than one hour. (01:07:30)
Revealing mistake: When the alien creature stabs the rich dude in the skull, supposedly they are in the same room, but behind the xenomorph you can see a background that can't pass for the airplane cabin, looks like a danky cave. Recycled footage from another production. (01:08:35)
Continuity mistake: Don swings the golf club at the creature on the bar; the stewardess ducks behind the counter and starts scurrying away. The creature jumps away, but in the next shot the bug jumps up her wazoo while she is standing and facing the counter. She couldn't be in that spot and in that position this fast. (01:04:15)
Continuity mistake: The facehugger-like creature puked by the co-pilot escapes Don's swings by making a hole in the wall behind the rack. However, at the cut you can see that wall and the hole is gone. (01:03:10)
Continuity mistake: First game of blackjack. The arm candy brunette whispers to her beau that everything will be fine. The casino guy moves his hand from chin to collar, but in the next shot he's back leaning against his palm with his chin. More of that in the next cut; her hand is on his shoulder, on the table at the cut. (00:30:10)
Continuity mistake: Janet escorts the two rich clients to their cabin, which happens to be literally next door. Forgetting the fact that it looks nothing like the luxury quarters of a plane, let alone a casino with millionaire bets, she closes the door, but then she comes out of the door that is still open. (00:23:40)
Revealing mistake: The co-pilot for some reason is analyzing some "hi-frequency signals" that the computer is picking up. The loop is not fluid though, and you can pick an exact frame when it's not like a chart spikes, it's a movie clip being played that reached the end and is starting from the beginning with a whole different image. (00:20:15)
Continuity mistake: The position, timing, and persistence of the green lights/auras induced by the 'storm' of green goo appear inconsistent throughout the scene. (00:14:00)
Continuity mistake: Janet and the tech guy are copulating on the kitchen counter. We see them through one of the airplane window, then the camera angle changes, and they are doing it with a solid wall as background. (00:13:55)
Continuity mistake: First play, a couple wins $500,000. The flight attendant/croupier puts down 5 piles of red fiches. In the close-up where she completes the action, you can see on the table the glass the woman was drinking from a split-second before, and there's an orange chip that wasn't there. The player at the end of table is also holding his glass with a single hand and not two. (00:09:15)
Revealing mistake: The pilot gets in the car to go to work, and pulls away from the curb. Or rather, from a flat image of a road with a car (shadows and distance from the other parked car are all wrong). (00:03:40)
Revealing mistake: When the two survivors get in front of the emergency door, their hair gives out all sorts of chromakey artifacts. (01:21:00)
Revealing mistake: Mike putts successfully against his opponent and decides to celebrate. He does so by juggling a golf ball; too bad it's a poorly textured CGI golf ball that does not even appear rigid. (01:02:05)
Revealing mistake: When Don leaves the cockpit to check on Jack, now sans tentacle, he walks right to left across spaces on green screen. His walking speed does not match the scrolling of the background. (00:46:45)
Revealing mistake: After bumping her knee, Janet retrieves a real bottle of booze from behind a stack of superimposed CGI bottles. (00:22:00)
Revealing mistake: In the final explosion, the plane loses two of its engines, or rather, a bad superimposed image of each engine that fly at the screen. (01:21:30)
Revealing mistake: When the Alien-like creature chokes the gambling lady with its tongue, the woman has no strangling marks of any sort on her neck. (01:19:10)
Continuity mistake: Don and the others find the corpse lying face down into the money. The larger bloodstains are faithfully rendered from one shot to the next, but the bills and the actor's hand have changed position. (01:09:00)
Continuity mistake: After the alien attack, the hole on the rich guy's forehead changes size between shots. (01:08:35)
Continuity mistake: The rich guy keeps putting stacks of money inside the briefcase, but it never fills up, with gaps appearing at the cut in spots he previously filled. (01:08:25)
