Scary situation on the train- angry guy

[Barymerry39]

I was sitting in a seat facing the door, and a guy who looked in his 20s was standing at the door for a bit.
At one point I saw him looking over at me quite a bit, so I probably slightly frowned and looked at my phone, I should've moved seats really.
The next minute he shouted 'What the fuck are you looking at me like that for you fucking bitch!'

I just froze in shock and didn't dare look at him again. I hadn't been comfortable with his staring and wanted him to get the message, luckily he got off soon after at the stop but it was scary. What else could I have done in this situation?

Not a question of victim blaming.
You have to be careful.
You can't know someone's looking at you, if your not looking at them either.
He probably though she was staring at her.

I did agree he's obvs not nice, that's why you need to be careful. You weight the situation up.
Anyway the happening has long gone now, it's only being kept alive by this thread.