While the Terminators slug it out, John comes running in and almost gets a shell in the face from Mom. She grabs him: "Next time you do what you're trained to do. You run!" she says, like SORRY I SAVED YOUR LIFE, MA, and they run out the door.
The Terminators crash through the floor, and Summer grabs a ripped-out power line and jams it into Chrome's neck. He jerks and shudders, and we see from his perspective as his electronic display winks out. Hearing the sound of a truck's engine, Cameron bolts, and outside, John and Sarah are briefly surprised when, despite having the pedal floored, Cameron has managed to hop into the back of the truck. Some nifty stunt work has her climb into the cab with the Connor clan. "Did you stop him?" asks Sarah. "One hundred twenty seconds until the system reboots," says Cameron, and she starts launching into her "I was sent here to protect John" speech and Sarah tells her to zip it. Cameron gives a look like, "John wasn't kidding about his mom being uptight." Back at the house, Chrome Artie reboots, clicks the OK box when his screen reminds him that the system did not shut down properly, and gets up.
As dawn starts to break the next day, John is sleeping in the truck while Sarah watches a topless Cameron pick bullet fragments out of her scarred body in some kind of abandoned warehouse or factory, while they wait before going across the border -- but if you do that, it won't just be Chrome Artie on your tail, but los federales Terminatos (and Terminatas). "You might want to put those back in the holster," says Sarah wryly, and it takes Cameron a second or two to process that Sarah's talking about her boobs. She obligingly puts her bra back on, and Sarah quizzes her about a few things. She's from the year 2027 (two years earlier than when Kyle Reese and the original Terminator were sent back, it should be noted), has been looking for the Connors for 73 days, and that Skynet missile defense system goes online April 19, 2011 (later than in the movie iterations, presumably due to Sarah's efforts to stop Cyberdyne in T2), declares war on mankind and triggers a nuclear apocalypse two days later. Sarah asks about Miles Dyson, and Cameron says someone else built Skynet, but they don't know who; she wasn't sent here for that, which is the Terminator equivalent of saying, "Sorry, that's not my department." She then tells Sarah that her fiancé went to the police: "You should have changed your alias." Sarah tells her to go to hell (even though she knows Cameron's right), and Cameron concedes that they would have found her anyway: "They always do."