The small details I completely dropped, such as closing and locking the driver's door, were sacrificed on the altar of pacing. The reader probably won't miss it because we see him buckling up and starting the engine. Why? The door would have been shut out of habit sometime between sitting down and starting the engine, no problem. Locking the door is such an insignificant plot detail that to emphasizeinclude it would probably call undue attention to it-- people may assume it is an instance of Checkhov's gun and expect it to become relevant when they get carjacked at the next stoplight.