When driving in King's car there is a clock visible on the dash when King looks back to Starr. The time varies each time the clock is seen, with minutes passing when 1 sentence is spoken, and then the last sentence happens 10 minutes before the last but one sentence.
When the girls were riding with King in his car, the speedometer and RPM tachometer were clearly visible in backseat view shots of King driving. The RPM tachometer would fluctuate up and down like normal driving, but the speedometer never went higher than zero to three MPH, clearly a sign that the actor was accelerating the gas pedal (while in neutral), but the car was being pulled or pushed for the interior shots.