Factual error: Right after Kyle saws off the barrel of the shotgun in the alley, he pumps a shell into it, then again after his dream of the future in the car, then a 3rd time in the night club before he shoots the terminator. The 2nd and 3rd time he pumps it, shells should eject. They don't. (00:35:22)
Factual error: In the scene after Arnold says "I'll be back", it shows the desk cop writing a report with a pencil. Any public servant or corporation knows, reports are only written with BLUE or BLACK INK... NEVER with a pencil. (00:59:15)
Factual error: Sarah and Lieutenant Traxler both state that Tech Noir, the club Sarah is in, is on Pico Boulevard. After the gun battle inside the club, Sarah leaves with Kyle and they run a short distance down the alley behind the club before getting into a car. The Terminator jumps on and falls off as soon as the car is out of the alley. When the cop calls it in, though, he says he needs an ambulance at 7th and Broadway. Even assuming Tech Noir was on the corner of Pico and Broadway, that is still about 3/4 of a mile away from 7th and Broadway, so there is no way that was the intersection just outside the alley.
Factual error: When Kyle is hot wiring the car he touches 2 wires together and you can hear the starter trying to start the engine. This indicates the wire is controlling the starter. Then he takes the starter wire and twists it onto the other wire, keeping them together. If you really did this the starter would be permanently turned on and grinding on the flywheel. In reality, you would hold the 2 wires together until the engine starts, then disconnect them.
Answer: Its simply a child being a child and playing, but more than anything, showing the innocence of the children that inspite of the near death of the human race all around them, there's still time to play and be... human.
GalahadFairlight