Audio problem: When the Terminator breaks into the police station, he has an auto-shotgun in his left hand, and a machine gun in his right. Before he kills the power in the building, he comes to the end of a hall, points his shotgun through a doorway, and shoots. A machine gun sound is used for the blast, instead of a shotgun sound.
Continuity mistake: When the Terminator says "I'll be back" he walks out of the police station. The cop inside the building looks out the window, looks very surprised, and you can see the headlights from the car shining on the cop's face. But when we see the car just before it comes crashing through the building the headlights aren't on. In the next shot of the cop the headlights are still shining on him.
Continuity mistake: In the Tech Noir Bar, the same woman - blonde with a pink or orange dress - must have come dancing with her twin, because while she's sitting behind Sarah Connor when the laser beam is pointed at her, she's also dancing near Arnie. The T-800 moves past her when he sees Sarah Connor and moves to shoot her.
Trivia: The skulls seen in the future segments were actually used as part of a technique to make the model set (and all the HKs on it) look bigger than it actually was. Fantasy II littered the set with little skulls that were about 3/4 of a inch in size and then placed a normal sized skull in the foreground for some shots. This created an illusion known as 'forced depth perception' which makes you continually think the scale of the picture you're seeing is larger than reality. An inexpensive but very effective trick.
Question: I've always wondered, what's the significance of the kid pointing a wooden gun and making 'pew pew' noises at Reese when he enters the human hideout? Is it meant to be purely a bit of comical play between the two, or a subtle inference that mankind will never be able to abolish its inherent desire to destroy itself, even in the face of total extinction?