Brain damage is a hell of a drug.
My dad and I once, coming back from a morning deer hunt, rounded a bend in the road and came upon an enraged trucker doing that to a minivan from New Brunswick Canada. We just sat there watching agape, then he broke off their antenna and started thrashing the van, yelling that the petrified family inside was next. We exited the truck holding deer rifles and he got in his truck and took off. I think about that poor family every time I see the border, we escorted them there and I kinda doubt they ever came back. They were all traumatized.
The road rage, she cares nothing for wheel count.