Mobs like that tend to get aggressive. But them together on a road with motorcycles and you are IMO asking for trouble.
You can see from the beginning of the video where the motorcyclist who stops in front of the car had been crowding right into the lane beforehand.
With his wife and baby in the car no wonder the guy was scared to death and tried to blast out of there to start. Might have helped if his wife had called 911 as soon as it started and they could have waited to meet some cops before pulling over.
I was set upon by a mob once. My own fault. The result of a series of really bad decisions on my part. But once the rocks started to fly, I transitioned from “I don’t want any trouble” to “I’m getting us the heck out of here” mode. I was fortunate in that I did not have to hurt anybody to extricate myself and the person I was with, more due to dumb luck than anything else. But once you get into a situation where your life is in danger, pretty much any use of force is on the table.
Getting off the highway was a mistake, here. The guy should have held the center lane and his speed. Giving up on mobility gave away his only advantage. Speed = Life. He should have stayed on that road until the calvary arrived or he ran out of gas.
PS. Never run out of gas. Fill your tank at a quarter.