February 2, 2020. Around 6 PM.
I will state only what I saw:
I was walking up a narrow stairwell with a large number of people. At the top of the stairwell, there was a woman sitting donning a face mask, sunglasses, and a large jacket (ostensibly to protect against 2019-nCoV). She was telling people to move to the right and letting them know she was there. I walked away from her because I wasn't bothered by it.
When I exited the turnstiles, I saw that a man was talking to her. At think point, I was still wearing my headphones, so I couldn't hear what he was saying. However, when I took off my headphones, I clearly heard the words "diseased bitch." I also heard her asking him to go away.
At this point, I saw this interaction I instinctively reached for my phone in case something were to happen. As I was doing this, I kept watching what was happening. The man suddenly got very close to the woman's face. I'm not sure why. He then hit her on the head with an audible sound. At that point, I had finally gotten my phone out and started recording. I started recording right when he was walking away, hoping to get a good shot of his face so I could help report the incident if the victim wanted. What I didn't expect was for the victim to chase after him. She was holding a glass bottle, seemingly in an attempt to attack or throw it at him. This is then the guy started attacking her. So ultimately, both parties had a fault, but the situation escalated with racial tension. I'm not sure if the woman was Asian or not, she was wearing a face mask and glasses, so I couldn't tell. All I know is that she threw the bottle on the ground and was very antagonistic to everyone around her after the conflict. I then left the station after telling the MTA station worker to call help if needed.
I don't have any other material of the incident, but I can say with complete confidence that everything I've stated is what I recall seeing. Whether she was drunk or not, I do not know. She could have been mentally ill, could have been drunk, or she could have just had a bad day. I do not know her and therefore I don't think it's correct to make any decisive assumptions about her.