Continuity mistake: In the scene where Cohaagen's team break into the train station, some of them enter through the top windows. It was previously established that the atmosphere in that area was unbreathable, but Cohaagen and the rest of the crew move around just fine without the need of a mask, even though the windows to the outside are broken.
Continuity mistake: At the final fight on the 'Fall', Doug affixed explosives at every brace. After crossing the Earth the top of the 'Fall' becomes the bottom- as well the explosives. But in the movie they explode again at top braces. (01:42:45)
Continuity mistake: Toward the end of the movie when Cohaagen and Quaid are fighting on top of The Fall, Cohaagen has taken a few punches and a foot to the face by now and has a cut on the right side of his face. After a toss, Cohaagen comes up with a knife and begins a short monologue with no sign of the injury, then it briefly comes back and then disappears again. (01:38:30)
Continuity mistake: In the first fight scene between Lori and Quade, Lori's pony tail miraculously disappears after she is thrown into the ceiling over their bed. The frames go between the two hairstyles during those for seconds.
Continuity mistake: When Lori is chasing Hauser and Melina in the car and he cuts off his gravity to drop to the floor. When they crash to the floor Melina's head is facing down, but when they flick between shots her head is facing up.
Continuity mistake: During the chase scene after Quade escapes his apartment it is raining, but Lori's hair switches between dry and wet continuously as she is chasing him through the rain.
Continuity mistake: When Quaid is fighting Cohaagen he is wearing a timer on his right wrist. Near the end of the fight it disappears and then re-appears.
Continuity mistake: After Hauser shoots Harry in the head, there is no bullet wound in Harry's head when he falls on the floor.
Suggested correction: The fall transport thing would actually make the passengers feel zero G force as they will be falling at the same rate and when falling objects accelerate. Another fact is that when an object gets closer to the core of a planet it will have a greater acceleration due to the law of gravity. The equation is (gravitational acceleration) = (gravitational constant) multiplied by (mass of planet) divided by (distance from centre of mass or core as it's called) squared. The earth's core is liquid due to the density of the iron which is the result of the massive acceleration due to gravity at that distance from the core. If a person were to fall from one side of earth to the other it would only take 42 minutes to travel the 12,800km.
That would still be an average speed over the whole journey of 18,286 Km/h (11,785 mph). Slower at the ends, faster during the middle section.
MedicOne