This happened a couple of weeks ago.
I live in California where driving is almost always aggressive. I often wonder if some of the drivers are high on weed or other drugs. I was driving recently on the highway when someone cut me off and almost slammed into my car.
I honked and gave him the middle finger. Yes, I know I should not have done that but living in California you get exhausted from the stupidity in some drivers.
Also, it is not uncommon for people in California to break-check you, flip you off, honk their horn, and follow you while they flash their lights, and yell at you through their window. It is kind of the driving culture here in California. Anyway, after I flipped him off, he then moved to the lane on my left and stared at me.