Outside, John races into the parking lot, while Chrome Artie fires bullet after bullet from the Nev-R-Empty clip on his automatic. It's a good thing he has so many bullets, because he's a terrible shot. But he doesn't screw around: he decides the best way to get past a school bus isn't to go around it, but to flip it on its side and climb on top of it, the better to scan the general area.
Over at some diner, an incredibly up-to-the-second newscast is reporting gunfire at Crestview High School. Sarah, waiting tables, has to make a split-second decision over whether her son is more important than making sure table twelve gets its pigs in a blanket.
Back at Terminator High, Chrome Artie has flipped over to infrared, and spots John crouching behind a car. He hops off the bus and starts towards John, firing the entire way. He catches up with John, huddling between two parked cars, and slowly raises the gun. Before he can fire (although he'd probably miss), he's smacked by a speeding truck. We hear squealing tires as the truck reverses, and stops in front of John. Cameron kicks open the passenger door, and an entire audience says in unison, "Come with me if you want to live." John thinks about it for a moment (probably something along the lines of "she drives like Billy Joel but she's pretty hot") and jumps in. As they drive off, we see Chrome Artie getting to his feet. John looks at the bullet holes on her chest (at least, I presume that's what he's looking at in that area) and she looks back at him, all, "My ocular sensors are up here."