at the beginning of the video, the biker 'stops short' and the SUV taps the back motorcycle tire, causing something to happen and everyone to come to a complete stop.

if and only if at that point, the bikers' immediate response was to take the helmets off and start smashing windows, or even if they tried to forcibly gain entry to the vehicle, i would be in full support of the SUV driver making a hasty exit while running over a human or two.

from what i could tell, it looked like they were all talking about it, approaching the window.