See, that is why I was so weirded out on that long hill country one lane drive in the dark-
he went from pale emergency blinkers far behind me to lights on long hold on super bright high beams, always on a no passing area, with me and the truck ahead of me going 70 (I think the speed limit was 65) and sometimes had to go slower for turns.
And when we got to a two a two lane passing area, he did not get ahead, even though the truck and I both scooted to the right lane for the mile or so we had two lanes.
So when he finally gunned in on a solid line on a curve with oncoming traffic, i physically could feel him...angry or not, he was like a passive aggressive driver and dangerous.
usually, a flickering of the lights is a warning, and is ok.
Emergency blinkers mean caution, slow driver, and high beams mean clueless or agressive driver. Alternating long time high beams with emergency blinkers, oddly not tailgating and even lagging behind, refusing to pass in a passing lane, and then gunning it and narrowly avoiding a wreck, yeah, I was weirded out, and had no idea what he wanted. if there had been a turn off road, I might have taken it to let him gain a few miles on me...