I had bouts with nightmares and such and a technique I found is that when the horrors begin to appear, I consciously try to be unaffected by them. To try to at

I had bouts with nightmares and such and a technique I found is that when the horrors begin to appear, I consciously try to be unaffected by them. To try to at least delay what you just described, that feeling of dread taking over you. While you can't really have control over the outside world and the horrors within it, you can at least have control over your reactions to it. And reactions to stimuli like this red flashing thing, and many other situations, are really about just the reaction of the mind, filling in the blanks, trying to make sense. The more you can relax that effort, the less horrific it will become. Similar to relaxing a muscle cramp. I'm not saying that I'm very good at this all, but going this way has helped me a lot already.