Could this man not have picked up on this?
As I acknowledged earlier, it's perfectly possible that her response/tone of voice/whatever caused him to think there was something more sinister than just the superficial actions. Maybe he did "pick up" on something, I don't know.
I would ask whether it is the normal response to a "vibe", but I'd be accused of trying once again to put black people in their place or something.
I will ask, however, whether that intuition/radar is only a trait of non-white people? It seems to me that if you credit this black man with being able to pick up on non-explicit racial undertones, it is perfectly possible that a white person might pick up on non-explicit racial undertones, no?
Yet when someone (me, for example) says "His whole argument was horrible and unnecessary, he's acting in a racist fashion, I don't think he'd have done it if she'd have been black, etc", I am told that because he didn't explicitly use race, it can't be racist (direct or otherwise). Maybe that girl on the train had a "vibe" about his rant? I certainly do.
Just pondering, not arguing.