Maybe "move B word get out the way" was playing in the range rover
But to answer your point Jim, generally no one has come out against the driving of the truck (and there were undercover cops there). From the reports i read, he complained (maybe by flipping them off) about their driving. Either way, I don't think it's illegal to flip someone off on the road but I'm pretty sure that stopping on the highway to zero is illegal especially by intentionally blocking three lanes.
A situation like this happened to me when I just got my license. I almost caused an accident by cutting someone off unintentionally. The driver sped in front of me and slammed on the brakes and started kicking my car. He was literally 3 times my size (and I'm 220 pounds). I literally froze in my seat. On those grounds I think had I been a little older I would have ran him over.