There could be so much unconsciousness going on that all you are aware of are the intense feelings you're having and all the stress that's unfolding.
If you remember to forgive at all, it will probably seem like a stupid idea, that it won't be helpful and there isn't even anything to forgive here.
If you're particularly convinced that someone or something other than you is the problem, and are all caught up in the drama of it, you may even refuse to forgive, or it may not even pop into your mind until you've had time to cool off.
The ranting, vicious, violent ego can be hell-bent on finding someone else guilty, and in those times it seems completely justified in holding its viewpoint, convinced that what it's seeing is completely true and obvious.
When I get into these kind of mindsets I don't even know where to start with forgiveness. It's like my mind is just all numb and forgetful. My awareness has become blocked and I can't even remember how to forgive at all.
To forgive, I find myself starting with some really basic and probably not very effective statements, to just try to start *somewhere*. Like, "I remember I'm dreaming". Like, sometimes you just need to START even if you can't remember what the truth is at all. Just start saying something even remotely forgiving with at least a tiny bit of truth to it - A LITTLE WILLINGNESS - and gradually it will chisel away at the psychological insanity and begin to reveal and remind you of a greater awareness.
As that awareness then starts to return to you, you will start to remember a bit more solidly the learning that you've achieved long-term, and you'll start to remember greater truths, become more confident in your clarity, and be able to get toward what the "real" problem is, is what you're doing to yourself. As your forgiveness process progresses, it actually opens you up more to reveal a greater awareness of HOW to forgive more effectively and with more truth and certainty.
A willingness to just go on this forgiving adventure at all is all you need to get the motor started. It will be all sloppy and vague and seemingly in effective at first, but keep going. All will be revealed. And you can come all the way back to peace through surrender.