Corrected entry: In the scene where the baby alien pops out of the woman's chest, she eventually dies but her head leans to her side instead of hanging forwards as it should do but then in the next shot of her, her head is hanging forwards. (01:09:35)
Corrected entry: Lt. Gorman is supposedly knocked unconcious when an overhead storage compartment in the APC comes loose and dumps a whole hord of boxes on him. I guess he's a pretty fragile guy because if you watch the scene in slo-mo the only part of his body that actually comes in contact with the boxes is his right arm. His head is never hit or even touched by them.
Corrected entry: As somebody has correctly pointed out in another submission, the hangar in the main spaceship is decompressing when the doors are open, and the draft from the escaping air is what causes the mother alien to loose grip on Ripley. How come therefore, when the doors are closed again, Ripley and Newt are able to breathe in the hangar? If all of the air inside the hangar was just expelled out of the airlock door, how come the hangar has air pressure? Admittedly, the hangar is very big, but the door is like 7 or 8 metres across, and the wind blowing is strong enough to push out the alien, so the amount of air lost in the time it is open for is massive.
Corrected entry: In scene where Ripley first meets Bishop he says "It is against my programming to harm a human being or through a course of action allow a human being to be harmed." Funny how he says this after doing the knife trick on Hudson (a course of action that could have definitely caused harm to Hudson).
Corrected entry: When the Alien bursts in through the window of the APC after rescuing the marines it clearly sprays red blood when it smashes the window, even though the Alien has yellowish acidic blood.
Corrected entry: In the previous movie, LV-426 had a ring system around it, yet in this movie, when the Sulaco enters orbit, the ring is no longer there.
Corrected entry: The guns fire 10mm caseless. Each magazine holds 95 rounds (according to the poorly placed counter). A springloaded magazine can only push bullets in one direction, so at most you can have two rounds alternated vertically in a compressed zig-zag pattern. You can't have five rounds side by side in a magazine, as there would be no way of moving them horizontally into the chamber as well as vertically through the length of the magazine. This means that a 100 round magazine would either have to be a drum or cylinder shape like that on a Thompson submachinengun or it would be at least sixty centimetres long.
Corrected entry: The crew finds half a dozen face huggers in the med lab, and two of them are still alive. One tries to attach to Burke when he gets too close to the glass case. If a face hugger was able to break the much tougher glass of Kane's space suit's helmet in the first film and attach to him, why wouldn't it be able to break through this less durable glass in this film to get on Burke?
Corrected entry: The marines are not allowed to fire in the reactor (which later explodes from damage caused by the APC with a 30 megaton blast), however it is described as a FUSION reactor. Fusion reactors do not cause nuclear explosions if they overheat. They can't. They just turn off.
Corrected entry: Whilst the phrase 'Fire in the hole' may have changed in the future, it is unlikely it would have two separate meanings. For example, the first is when the APC catches fire, (as in fire in the APC) and the second is when Vasquez throws the cannister in front of the sentry guns (the more traditional meaning-i.e. throwing a grenade). Both these phrases have nothing to do with each other, but are still used in exactly the same way.
Corrected entry: In the scene where Ripley drives the APC into the hive to save the marines a flamethrower accidentally ignites the APC. When this happens Hudson yells "Fire in the hole" to tell everyone that the vehicle is on fire. Any marine would know that this phrase means that an explosive charge has been placed by the speaker and has nothing to do with anything being on fire.