As persiandog's video explains, the guy got out of his car on the Florida Turnpike, on an exit ramp. This is, essentially, an interstate.
He wandered around, and got into the traffic on the road, causing the traffic to slow or stop. At that point, he jumped onto the hood of the ABF truck.
That truck had to be going slowly. If an 18 wheeler is doing 20 and you jump in front of it, you will be killed.
So the truck is stopped, or maybe doing 5 mph, and the guy jumps on the hood. At that point the driver needed to pull over onto the shoulder, lock the doors and call the cops, case closed. You can't break the windows of a vehicle with your fists.
Instead the dumb ass ABF driver ran it up to 30 or 40 mph and began swerving wildly, to knock the guy off. Had the guy fallen off and the truck ran him over, that is a felony for the driver. Vehicular homicide. Even worse his wild driving could have caused a big accident in which civilians were hurt badly, or killed.
The driver had the choice, pull over, or keep driving. By driving faster and swerving, he would have caused the man to fall off and then he was killed. The actions of the driver would have caused the death of a person.
That is why, six ways to Sunday this goofball driver is out of work.
However his driving career may not be over. He may well not have gotten a ticket. Three weeks from now he applies at another company, says he "left ABF" and they will probably hire him. ABF will tell the new company "He used to work here and now he doesn't." They will never tell why a guy was fired.
If he didn't get a ticket he is home free. Hopefully, the driver has learned a lesson.