Prior to Isabella allowing the SEALs into the Faraday room, she explained how just showing it to them could get her thrown in prison. Yet, in later scenes, the room has two windows for them to easily see through to the other side.
In the navy seal headquarters whilst making a milkshake prior to the briefing, the time on the wall clock jumps from 10:09 to 7:55 a minute later, then after another 21 seconds it reads 10:22.
Prior to entering the facility, the two brothers can be heard over the radio arguing over going through the front door. Yet the team leader had to press his push-to-talk switch to make his next communication.
In the introductory scene at the shooting range, whilst helping Meredith with the pistol, Mike's ear defenders instantly switch between his ears and neck several times.
When Chris is being held captive at the end of the film, he randomly changes position between cuts (kneeling on both knees, squatting, squatting with his left knee raised, and squatting with his right knee raised).
At about 1h 5m, the marine is wearing an experimental Faraday suit. This is described as blocking all electromagnetic radiation. The marine uses his radio inside the suit, when this would be blocked.
When changing out spent magazines, twice they use the wrong signal words (one says "cover" and the other says "reload"). The correct term is "changing".
At 0:45 when the alien fires the weapon at the soldiers in the doorway, the beam is discharged at about 45 degrees, upwards. The next shot shows it hitting the stairs in front of the doorway, coming down at about 45 degrees.
A beam of energy would not change direction, with a gravity as weak as the earth's.
A beam of energy would not change direction, with a gravity as weak as the earth's.
Mike's pistol in gun range is obviously airsoft replica gun: gas port and bb's in the magazine are clearly visible.
At 52m the computer monitor flashes to green revealing the tape used for the green screen process.
At 1:11, obvious scene edit. The video of the SEALs in their firing position changes dramatically.