Audio problem: When Sarah is firing her pistol in the desert we see the slide lock back. However the hammer still manages to hit the firing pin, making a click noise - that would be impossible. (00:41:20)
Audio problem: When Dr. Newton and Hermann are with the baby Kaiju, Hermann says "Should be three," but his lips aren't moving at all.
Audio problem: When the train pulls away after being decoupled it really sounds like a steam train, not a diesel electric. (00:59:30)
Audio problem: In the mansion during the second scene, Louis is among the group and his phone goes off vibrating. It is extremely obvious that the sound of the phone vibrating was actually someone humming in attempt to mimic the sound, and doing a poor job at it.
Audio problem: When the SEALs in the Chinooks take fire, a helicopter crew member fires their weapons. The weapon is a M240 7.62mm Machine Gun, but the audio of it firing is that of an M134 Minigun.
Audio problem: On the oil rig at the start of the movie, the 2 actors monitoring the deep sea submarine's progress are subjected to a major explosion noise - yet they don't even notice it. Only when the 2nd explosion comes and rocks the whole rig do they react.
Audio problem: When Armedeo and Estefania are ready to leave in the car, George stands in the driveway with a gun aimed at Estefania. Armedao gets out of the car, but the car's ignition goes off without Armedeo doing it.
Audio problem: When Mindy uncovers her motorcycle and starts it for the first time in the film, the engine sound suggests that the motorcycle (which appears to be a Ducati 1199 Panigale) has a 4-cylinder engine (identifiable by the distinct smooth car-like sound with higher pitch). The Ducati Panigale has a 2-cylinder engine, which should be sounding a lot rougher. But in the end scene where Mindy drops Dave at his house with her motorbike, it makes a completely different sound, which is how the 2-cylinder bike sounds in reality. (00:14:10 - 01:34:25)
Audio problem: When the Police play "Roxanne" for Hilly, the actors are just lip-syncing to the studio version; though his laugh has been edited out, the atonal piano chord at the beginning of the song, a now-famous gaffe from when Sting accidentally sat on a keyboard during recording, still remains.
Audio problem: When preparing to go into the hospital, Wanda looks in the side view window of the car. While speaking about covering her scar with a cut, her mouth never moves.
Audio problem: When Jeremiah talks to Portia when she returns to the Quest school, with the camera showing the side of his face, he is not speaking the words we hear. (00:42:00)
Audio problem: When Mia tries to escape in the station wagon there is the sound of tyres squealing on asphalt when the car is on mud.