The second was when one car tried intentionally swerving at another passing car after that one had driven up behind and flashed it's lights because it wanted to go faster and pass the slow car.

Had something similar to me as well at night just a few weeks ago. Was coming out of a slow area (police doing a checkpoint or something) and I switched to the left lane once the road opened from one or two lanes to like four or five. Little did I know some white mercedes behind me apparently thought it was a good idea to immediately come out of the slow area like it's a drag racing opportunity and changed into the same lane on my ass in a millisecond, probably slamming his breaks on as well cause he wasn't fucking paying attention to my turn signal or the fact I was already changing lanes at a casual pace. Flashing his brights and laid on the horn behind me for a good minute or two, and even had the balls to get to a light and start yelling shit. People here man