Its her. It doesn't matter what she didn't like, its her. I don't know if she's just having a really bad day or something more long term. I'm a therapist and I have had clients describe doing things like that woman did and then feeling really badly about it. I also know many do not feel bad about it.
I have also been on the receiving side of this, like you. Just driving a long, sometimes not doing anything unusual, and someone goes off on me. It is a little hard to shake, and feels like someone has been aggressive against me. It can stick with me a while too, even though I know its not about me and try to go on with my day.
lucky single mom to 20 yr old dd and 17 yr old ds through 2 very different adoption routes