I think the driver helped save the guy more than anything. If he would have came to a complete stop when parked right beside the car the shooter could have unloaded into him at point blank range. The guy fell when the car was beside it. But he kept going and then stopped and started again giving him a chance to at least roll away before the guy got out and ran to him.

It's hard to imagine what is going through their minds in those moments. Pure adrenaline and panic I can only imagine.