I had one of those a while back. We were stuck behind a line of like 6 cars so there's nothing to be done but he's behind me flashing his lights and all pissed. Eventually there was a gap in the right lane and he used that to pass me and then cut off the guy in front of me hanging out his window and flipping me off the whole time. He then cut off the next person in the right lane and immediately get stuck behind the person in front them and all of us in the left lane passed him again which was pretty funny.