Is it possible abuser doesn’t remember hitting me?

I’ve googled this and found a few articles about “narcissist black out eyes” and how when rage takes over they sometimes blackout.

Im asking for personal experience because a few days ago my boyfriend hit me repeatedly for the first time. I made a post here about I started an argument and it ended with him kicking me in the face and ribs.

He has tried talking to me and when I brought it up, he was shocked and said I am lying. Now it’s entirely possible he is gasliting me, but he ACTUALLY seemed surprised and taken back by my statement. He didn’t get mad, he just asked questioned as if he really didn’t know what happened.

I wonder if this “narcissist black out” happened? Of course he could be lying, but his reaction and confusion seemed very very real.