This is some dash-cam footage from Russia (where else?) of a guy in a Toyota Camry constantly trying to get in front of and stop another Ruskie in a Nissan MPV, presumably to stab him with the the knife he has. He finally gets the guy to swerve off the road into a ditch, then climbs on top of his van (after slipping and eating shit a couple times), when he discovers, SURPRISE, his adversary brought a shovel to the knife fight. And, as I'm sure the original attacker's shattered hip will attest, it was a smart decision.
Keep going for the video, but the real action is at 0:45, 2:30, and the accident and fight beginning at 3:00.
Thanks to Christian and rab, who agree the best way to win a road rage battle is to make sure you're driving a Transformer.