Thing is, if you're in a relationship where you've been terrorized (that's what it was for me when he was drunk because I just never knew how far things would go), you're quick to jump. So this incident may not have been "too bad" but if there was a previous history the uncertainty of what was to come likely factored in. The fear of escalation because once someone's in that mode, it can quickly turn.
I also refused help...victim's services, etc. I was drained, tired. I didn't want to have to do any work, I just wanted peace.
I was quick to phone the cops toward the end....because, in my heart, I was truly scared of that one time where it could go way too far. There was always the potential for that (I even wrote a letter in case).
And I know all too well that it's not just women being abused. I saw my Mom do stuff when she drank and it was likely why the stuff with my ex was tolerated by me...it was familiar.