Actually holy shit, this reminds me of something similar that my old flatmate did. Infact, almost identical.
This is NOT bs. I swear to god this happened and it was like... A dream. Like seriously if you were there, it was something out of this world when he told us.
So what happened was, i was sitting on the couch, and my other flatmate was there. Our older flatmate (He was in his 40's), came home from work. Someone asked him how his day as and he says, and i quote :
"Yeah not too bad, Punched this bitch on the bus though".
And no shit, it was the most surreal moment you have ever seen. I was like.. w..t..ff... Like it was unreal how i felt at that moment.
So i burst out laughing and he explains what happened. He was on the bus home, and some maori (New Zealand native, like african american in america) girl was on the bus. She was drunk and hassling a bunch of school kids (It was around 3pm which is the time school just gets out).
Anyway my flatmate was looking at her like wtf are you doing, cause she was yelling and screaming and what not. And then she goes "What are you looking at n1gg4" (Yes those actual words). And then my flatmate (Who is maori himself), said "What did you say", she said "You heard me black boy". And so (No shit this how he said it), he got up, walked over to her, and punched her in the face. Then told the bus driver he would like to get off now, and walked the rest of the way home.
At this point in his story i was in fits of laughter. But he was deadly serious. And as i say, it was completely surreal the way he explained it.
Those were the days...