I woulda been on the phone with 911 when it was obvious it wasn't a honk and go. This driver should not be on the road, he probably "punishes" other drivers in any number of unsafe ways when they do something he doesn't like. And from my observation, nothing drives these freaks more insane than someone driving in a safe and careful manner and not exceeding the speed limit.

As far as "defending" myself in such a situation, I probably could if push comes to shove. But I'm not so confident in my pugilistic skills that I'm going to start a fight without superior firepower. It's not some sort of social imperative any more, we've advanced past that as a society. That is the behavior of the people that don't do well.