(at around 1h 19 mins) While the Terminator and the T-X are fighting in the bathroom, toilets, sinks and water pipes are broken; resulting in water gushing everywhere. Despite this, both the Terminator and the T-X's clothing remains dry throughout the fight.
(at around 1h 29 mins) As John and Kate take off in a blue Cessna it has the registration number N3035C. In flight it is N3973F and when they land it is back to N3035C.
(at around 31 mins) The front end of the vet truck is clearly damaged when John Connor hits the civilian car at the red lights. However, moments later when the crane truck catches up, no damage can be seen.
(at around 34 mins) The same silver Volvo 740GL sedan is destroyed several times during the crane chase. Each time it is seen, damage from previous hits in earlier scenes is clearly visible.
(at around 58 mins) In the Hearse scene, the hub caps get knocked off, then reappears several times during the chase.
(at around 30 mins) Having control of a vehicle's computer would not allow the car to be driven remotely, as the steering is completely mechanical (even power steering), and although some modern cars have a computer controlled throttle (not the cars in the movie though), the pedal would not depress (same goes for the brakes, clutch and gears).
The entire chase scene with the crane ignores numerous laws of momentum, inertia and tensile strength. Using the crane arm to demolish a steel-framed building would not only completely mangle the arm, it would also cause the crane itself to crash, instead of which it doesn't even slow. Similarly, whilst the vehicle easily has sufficient mass and momentum to smash cars out of its path, having a tonne or so of metal hitting it at roughly 40mph is going to have an effect on the steering, it wouldn't just casually carry on in a straight line as if nothing happened. Most significantly, after the T-800 drops the crane's hook through the manhole cover, the hook would firstly need to actually latch onto something to create the desired effect (instead of just getting pulled right back out again and dragging along behind the crane) and whatever it anchors itself on would need to be sturdy enough to stop the tens of tonnes of crane - if a building can't do it, it's rather unlikely that a sewage pipe is going to. Even if such an item could be found, the cable would not tear through the road without slowing the crane down at all and would in all likelihood bring the crane to a much slower, more drawn-out and less visually impressive (and hence much more boring) stop.
When the T-850 enters General Brewster's office, it locates the safe and rips the door off by pulling its handle. Safe handles are built fairly weak specifically to make sure that kind of thing can't happen - realistically, the T-850 would've just ripped the handle off the safe, rendering it virtually impossible to open.
(at around 29 mins) Firefighters are seen extinguishing a vehicle fire outdoors with a carbon dioxide fire extinguisher. These types of fire extinguishers would be ineffective on a car fire as they work by depriving the fire of oxygen. Carbon dioxide quickly disperses outdoors and the fire would have its oxygen back in no time. Firefighters use dry chemical extinguishers on minor car fires and hose lines on larger ones.
When Terminator throws her in the Vet's truck, he takes a crowbar shoving it between the 2 door handles. He then bends it with one hand.
This is not possible because the force it takes to bend a crowbar, without holding both ends of the bar to bend, the door handle is not strong enough to hold "the other end" for him and would tear off.
(at around 16 mins) In the T-X POV shot where she examines Jose Barrera's retina and name tag, his surname on the tag is spelled differently from how it is in the T-X's POV. (This may not be an error, however, as nametags often get misprinted. Ask any employee of a cheap chain store/restaurant.)
(at around 1h 35 mins) When the T-101 is holding open the Crystal Peak bunker blast door he uses one hand to hold back the T-X from getting to John and then use the other hand to pull his power cell out. This did not leave an arm available to hold open the door, however the door could have stopped functioning after a while when meeting significant opposition from the Terminator.
(at around 56 mins) When the casket opens in the hearse, which was first seen full of weaponry, it is now hiding John Connor. However, later on they are seen to be armed to the teeth. Look closely, and you'll see John is laying on top of the weapons. Some space made with the removal of the .30 cal MG, along with the curved upper lid, left enough space for John.
(at around 56 mins) The .30 caliber machine gun (with the drum clip) that The Terminator uses against the police outside the mausoleum is supposedly dropped before he enters the hearse. However, later we see it beside the coffin, but it is possible he turned for a moment, and tossed the weapon in beside the coffin, where we see its perforated barrel shield as he's reciting the T-X's target list, and later as he carries it to the RV.
(at around 16 mins) The Terminator hesitates before breaking the ignition, instead checking for the keys behind the visor. This implies that this model remember the Terminator learning the trick in the previous film. That is impossible.
He didn't find the keys above the visor but a watch that he immediately used to synchronize his time after the move through time. He probably heard it and didn't need any information from the past.
(at around 59 mins) When the T-X's weapon is damaged, her on screen display chooses a new weapon. The display shows the name of the weapon and a description, but if you look closely the description for all of the weapons simply states: "Important information about this weapon is being displayed here".
(at around 53 mins) When Kate's fiancé (the T-X) is informed of her whereabouts, the T-X punches through the seat and through the agent driving the cruiser. As the officer is leaning forward in shock and dying you can see the ignition of the cruiser is in the off position.
Most of the other cars destroyed during the crane chase are already severely damaged.
(at around 1h 40 mins) In the end credits, the character of Kate's fiancé is listed as 'Scott Petersen'. Actually the character's name is Scott Mason (mentioned by the two L.A.P.D. detectives in the movie). (This was an editing goof, altered because of an event noted in the 'Trivia' section.)
(at around 55 mins) When the Terminator exits the mausoleum with the casket and turns to fire at the police, the angle of the machine gun barrel as he fires is such that all bullets would hit the tree tops above the police cars rather than the cars.
At ~ 16m, even though the T-850 somehow knew to check the visor for the keys to the pickup, he still hot wires it instead of using the key.
(at around 16 mins) Name of Jose Barrera is misspelled (Barerra) on the robot's screen, yet it says "Match".
(at 59 mins) After the T-X is hit by a truck, her primary weapon is damaged and she is seeking a replacement. As she is cycling through available weapons, dummy text is clearly seen below the weapon name. The text reads:
TEXT regarding the current weapon is being displayed in XP040 weapon sub window.
Important information regarding this weapon is being displayed here."
None of the machines would have augmented reality vision with graphic overlays on their vision. The values of sensors would be directly available to the internal systems. Nobody would watch the reality and augmented vision.
When the Terminator takes his first Car, he obviously remembers, to get the key from the sun-panel as learned in T2. Later on he says, he is not the same Terminator as in T2 and John Connor stated, that he has to learn him everything again.
(at around 1h 2 mins) Sarah Connor dies in August 1997. In accordance with her will she has many guns hidden in a coffin right after her death. After the cemetery scene, at the RV, The Terminator pulls a Heckler & Koch UMP-45 out of the coffin. This gun wasn't for sale until mid-1999, two years after the gun was placed in the coffin.
In the beginning of the film, the T-850 Terminator gets the keys of the stolen car from the sunshade. But there is no way that this terminator could have learned this trick. This terminator has never met the previous one (from T2).
(at around 9 mins) When the T-X is pulled over by the police officer at the beginning of the film, the officer walks up to her in the Lexus. Just before the officer says, "Lady, do you have any idea how fast you were goin'?" we see the T-X's mouth moving as though she's speaking, but we hear nothing.
(at around 15 mins) The naked Terminator squeezes the stripper's hand to get his clothes, while "Macho Man" by The Village People is playing. When he walks out the front door all dressed up, after what should have been several minutes, the song on the P.A. system hasn't skipped a beat.
(at around 1h 30 mins) When John and Kate land the plane in front of the bunker, a third person is briefly visible in the backseat.
(at around 1h 5 mins) At the end of the scene where they are by trailer, when the camera is on the Terminator, the camera tilts down revealing an apple box underneath the table.
(at around 31 mins) Just before John Connor crashes into the car in front with the Tundra, there are a couple of shots shown from inside. During these shots, there is a cameraman visible on the extreme left hand side of the frame, hiding behind a black jaguar.
(at around 1h 19 mins) When the Terminator is pushing the Terminatrix through the toilet walls, on the far right, you can see the camera and operator with a plastic sheet over the camera.
(at around 1h 6 mins) When the Terminator and friends are in the RV in the desert, when the camera is outside the RV while it's driving, you can see blue screens covering the windows inside! As you know the blue screen is a wall for computer simulation as when an actor is in a car or truck the car never moves yet the outside world does.
(at around 16 mins) When the T-X kills Jose Barrera at the fast food restaurant, the drive through window is on the wrong side of the building. The T-X could have driven the wrong way but it was shown at the speaker, driving the direction that the drive through should have been.
(at around 1h 17 mins) The Terminator tells Kate and John that the Crystal Peak base is "north east on a bearing of 'zero point five degrees'". A bearing of 000.5° is almost exactly due north. Later Kate flies the plane on a heading of 015° ("zero one five degrees" in aviation-speak). This is different from what the T-101 had told her, and even given his mistake it is still closer to north than it is to north east.
(at around 16 mins) When the T-X drives up to the drive-thru restaurant, the window is on the wrong side (the passenger side of vehicles in the US). Also most of these restaurant types use the spelling "drive-thru" not "drive-through".
(at around 38 mins) After the crane chase, whilst the T-101 is climbing into the vet van from the roof we can see briefly down the street that there's a corner approaching as there's buildings just ahead of them. However when the T-X emerges from the rubble and looks down towards them driving off, they're now on an open road with nothing at all ahead of them.
John Conner and Kate Brewster recall having made out in Mike Kripke's basement when they were younger. Basements in Los Angeles houses don't exist due to building codes designed to protect against earthquakes.
(at around 1h 7 mins) At the RV, we learn that the Terminator must obey Kate Brewster's orders, as she is the one from the future who sent him back in time. However, there are several times preceding this scene in which Kate Brewster barks orders at the Terminator (i.e. "Let me go!", etc. ) and he ignores her.
When the T-X is approaching Kate Brewster in the cemetery as Scott Peterson, she changes back as herself, giving the T-101 the chance to know who she was and use the RPG. If she had stayed as Scott, she would have easily killed her, thus taking another target out.
Why does the female terminator wait until the end of the movie to corrupt Arnold's terminator when she could have corrupted its system in the beginning at the Vet clinic after she blasted him? He was pretty much unconscious or turned off while she walked around to take control of the vehicles.
(at around 1h 35 mins) When John and Kate get to the Crystal Peak base and the Terminator blasts the T-X with the power cell, he also destroys and buries the only way in and out, how do Kate and John leave the base?
In the final fight between the T-850 and TX the T-850 removes his power cell knowing that it will explode and kill him along with the TX however it is well established that he cannot self terminate.
(at around 49 mins) Sarah Connor's plot at the cemetery said that she was born in 1959. However, the events of The Terminator (1984) occur in May of 1984. The setting of Terminator 2: Judgment Day (1991) is ten years later and it is revealed that Sarah is 29 years old, making her 19 during the events of the first film and what would then place her birth date in 1965.
(at around 2 mins) In the voice-over, John claims he was 13 when he was attacked by the T-1000 in Terminator 2: Judgment Day (1991), but John Connor was 10 in that movie (However Edward Furlong, the actor playing John Connor was 13 at the time of filming).
At the conclusion of the crane chase, the T-850 climbs into the cab of the pickup truck and proceeds to examine John for brain trauma by wrenching him around violently and shoving him back into his seat, potentially causing or aggravating a neck injury. Given that the T-850 is programmed to protect John, it should not be behaving in this way.
(at around 14 mins) When the T-101 scans the roadhouse bouncer, his internal display misspells 'briefs' as 'breifs'.
(at around 1h 13 mins) There is a reference to the Skynet computer operating at 60 "teraFLOPS per second", which is an inaccurate use of the term FLOPS (tera is correct, as it means trillion). A FLOP is an acronym for FlOating Point Operation and a FLOPS is a FlOating Point Operation per Second (note that FLOPS is singular, not plural). The FLOPS count is used to measure a computer's performance, particularly those in the scientific and academic fields. So to speak of "FLOPS per second" is redundant. One could argue that "FLOPS per second" refers to acceleration (such as miles per hour per hour) but members of the scientific computation field never speak of a computer's acceleration.