Continuity mistake: David and Allison pull up to the corner across the street from David's father's old place. In the close-up of them in the car, the surrounding area around the car is completely different than the area shown around the car in the wide shot. Also in the wide shot we see cars parked to the right of the screen. After crossing the intersection, they pull into his father's old place, and we see the same sidewalk across the street, but none of the cars that were parked there in the previous shot are there now. Then when they pull away, again the parked cars are different. (01:02:20)
Continuity mistake: David and Allison drive away from the station, after David learns of his father's death. When the camera is just on Allison, sitting in the passenger seat, the view of the background behind the car is very different than the view when the camera is just on David. (01:04:55)
Continuity mistake: After crashing through the guarded barrier of the base, David drives the stolen pickup truck and burning debris from the electrical storm falls onto the hood of the truck. In the next close-up the burning debris is shaped differently. Then after they crash through the wall, in the wide shot there is no burning debris on the hood. Yet, in the next close-up there's plenty of burning debris, but then in the next shot there is no burning debris again, just a smoking engine. The building debris surrounding the truck and behind it, in the first shot differs from all the building debris in the second shot as well. (01:21:50)
Continuity mistake: David's hairstyle changes throughout the movie multiple times between consecutive close-ups and wide shots. For example, at the base when he's in Dr. Longstreet's Lab, as he speaks with Dr. Longstreet David's hair continuously changes between shots. (01:23:00)
Continuity mistake: As David walks with Dr. Longstreet, just before he enters the vortex, the man behind David is carrying David's helmet. In the first shot the helmet is right side up in the man's hands, but in the next consecutive shot, the helmet is held upside down. (01:27:40)
Continuity mistake: After David has gone through the vortex, he grabs an axe and starts to hack some of the equipment. In the next close-up shot he stands at the doorway without an axe in his right hand, but in the next wide shot the axe is back in his hand. (01:31:50)
