Meet road rage's poster boy. This guy is absolutely out of his gourd, as can be seen by his more or less unprovoked terrorization of this law abiding former police officer.
But even though Ken Olsen got the whole chase and psychotic windshield smashing episode on video, his attacker is still out there somewhere. Olsen's truck got pretty beat up, but he said his face isn't, as intent as the psycho seemed upon rearranging it.
(Hat tip to $kaycog!)