Audio problem: In the Prom Gazebo scene, Bella wonders why Edward will not turn her into a vampire. Edward says, "I'm not going to END your life for you." These words do not match his mouth and appear to be dubbed. "End" being dubbed over some other word, possibly beginning with a "B". (01:46:40)
Audio problem: The sound for the Cessna 208 that our characters take to Isla Nublar is that of a piston engine prop plane, while the plane is actually a turboprop plane. The start-up and cruising sounds are significantly different from what it should be in real life. (00:20:00)
Audio problem: When Catzilla is chasing the mouse and gets stuck in the mousetraps and starts meowing, if you look closely at the mouth, the cat isn't really meowing at all.
Audio problem: When Snakehead grabs the medallion from Jackie, Jackie screams in pain. However, any Jackie Chan fan can hear that it isn't actually Jackie screaming. (01:05:25)
Audio problem: During the chase at the end of the movie, the police cars' tires squeal in the dirt.
Audio problem: When E. Johnson and Sam are hiding behind a pile of tyres, spying on Lester, after Lester's group has pushed the caravan off the cliff, Johnson gets up and says "We're gonna take a little detour," but her mouth is shut. (00:32:00)
Audio problem: When Terry enters the Queen's Ball with another man, the man says to his wife "You're getting very shrill," yet his mouth isn't in sync. (00:48:55)
Audio problem: When Shame points both his guns to the 2 guys in the beginning of the movie, you hear both guns click, but you can see that they are already cocked.
Audio problem: When Bond and Domino are dancing the tango, we hear Domino ask, "What is it you're after?", but her lips don't move. (01:17:40)
Audio problem: When Cort is taking off with the caravan you hear the wheels squeal. However he is driving on mud so that would be impossible. (00:37:25)
Audio problem: The pitch of an airliner's engine doesn't change dramatically when going through rough turbulence. In the scene with the turbulence - after all is quiet, it almost sounds as if the engines are shut down. And it happens way to fast for it to be the pilots doing it. And why would the pilots speed up when entering turbulence?
Audio problem: When the troops are lined up on the fort's wall near the end preparing for the waves of bugs, Lt. Rasczak is walking at a fast pace behind them and shouts something before aiming his gun. Before he aims his gun, he is seen shouting the same thing as he walks past them, but there's no sound coming out of his mouth. (01:29:25)
Audio problem: In the scene in the shower when Vesper says that she feels she has blood on her hands that won't come off, her mouth says "hold me" but she actually says something different. Also she says "please" but nothing is heard.
Audio problem: In the scene where all the towns residents take refuge in the Prosperity Mall, the mall's janitor/caretaker guy says something to the female sheriff with the camera facing him. In mid sentence the camera angle changes to behind the janitor but at an angle - you can hear him keep on talking but you can see that his jaw is perfectly still meaning that he can't possibly be talking. (01:11:25)
Audio problem: When Steve is thanking Melissa for marrying Mark, the bride turns out to be Angela. Angela knocks Steve to the floor and grabs a gun from under her wedding dress. You can hear the sound of a hammer cocking but the gun turns out to be a hammerless automatic.
Audio problem: When the group piles into the lifeboat on the crashing plane, Shorty (who is stuck between Indy and Willie) exclaims "Indy, I can't breathe!", but his lips don't move. (00:17:35)
Audio problem: In the scene where Kalgan confronts third engineer Steve Godell on the catwalk, he laughs before saying the line: "third engineer Steve Godell?" The laugh begins while Kalgan is obscured by the set, and continues as he moves into the scene. As he steps from around the corner, you can see his mouth is closed and not moving at all, despite the fact that his laugh can still be heard for 3-4 seconds.
Audio problem: When Zero and Marcel are fighting over the music near the beginning, the music regularly changes before their fingers reach the buttons.
Audio problem: When Pestilence puts the bug in his mouth, we hear a crunch as if he is chewing it, yet a few seconds later he spits it out and it is not chewed up at all.
Audio problem: When the Statue of Liberty's head strikes the top of a distant building before landing in the street, sight and sound are simultaneous. There should have been an audible lag in the sound due to the speed of sound being only about 1000 feet per second. The absence of this lag would be acceptable in most movies but is inconsistent with the amateur home movie theme of Cloverfield.