My opinion is that he did not fully understand the gravity of the situation and was trying to save the car. Instead he had them both trapped in the moving car and he was fanning the flames.
He should've dragged the wall to slow the car down. *If* the door ended up being pinned, then his passenger wasn't 600 lbs. He could get across the center console just fine. From the dialog, it sounded like he rolled past a couple of spots where they could have ditched into grass.
His passenger understood (maybe because of the clouds of noxious smoke rolling into his face) and was about ready to bail and roll from a moving vehicle rather than ride that out any further.
A word of advice, you see smoke like that, you're not saving your vehicle, so you'd better focus on saving your butt!!
Sent from my LM-G820 using Tapatalk