On the scanner, the Terminator hears that Reese's vehicle has been spotted in a parking garage and flips a U-ey.
In said parking garage, Reese hotwires another car.
Sarah asks the small guy why the Terminator wants her.
Reese lays down a history lesson.
A few years from now, a defense network computer will gain super intelligence and decide that humans aren't so great, after all. It will begin a nuclear holocaust that will wipe out most of humanity. The survivors will join together under one man, who shows humanity how to fight back. His name will be John Connor, and he's Sarah's future son.
Reese gets the car going just as the Terminator drives by.
The Terminator chases Sarah and the small guy out of the parking garage. Reese drives while taking shots over a terrified Sarah.
Reese rams into the Terminator's police cruiser. It smashes headlong into a concrete wall and is demolished.
Reese's car stalls because…plot point? The police arrive and arrest Sarah and Reese.
The police slowly approach the wrecked cruiser, but the driver's seat is empty. The Terminator is gone.