How does stuff like this happen?
On my way home in rush hour traffic on the highway. I'm in the slowest lane. I'm following the black Civic Si in front of me by a good 4 car lengths. In my mirror I can see a white BMW bombing down the adjacent onramp acceleration lane. Either she's going straight (offramp) or she's going to pull one of those last second merges to get by 10 vehicles.
I don't care--it's rush hour. We're all trolling along at 15-20 mph. In fact, my car's in neutral and the clutch isn't depressed--I'm just rolling via momentum.
So just as the Bimmer (white 320i, CA plate 7ERJ169, with sparkly bedazzled license plate frame) passes through my blindspot, the lady slows down, gets about 1/2 a carlength on me so that I'm looking at her C-pillar, and then proceeds to merge INTO me! (No signal, BTW.) WTF? Obviously I lay on the horn and brake to avoid the imminent collision. With a 4 car length gap to shoot for, she shoots for me?! How do you not know a car is there when you're the one who's making the pass and haven't cleared said car?!