I think it's one of the grooviest and strangest feelings. Most ppl say it's a situation that you have been in before or seen. If that's the case then we would have it daily in our normal routine. My thoughts it's a lapse in time where we are completely in the moment of life. If you think about it we are never really in the pure moment except maybe after an orgasm and of course meditation. But when it happens it feels like your brain just stops for a split second and you observe your surroundings.

so I like your explanation better. I got another theory but still working on it.
. If I were to bet money on it I would guess it was in a forgotten dream and it played out exactly in reality. Dreams still fascinate me if I were to tell you my patterns of dreams you'd think I was exaggerating. I have separation and abandonment issues due to being adopted. So multiple times a week I have dreams that I'm in school and can't remember my next class. Panicking like it's the end of the world. Then I'm trying to contact my mom but never can get ahold of her. Never dream about women or super fun stuff anymore. All lost dreams
that rabbit hole was deep as hell for me this morning.