Deja-Vu...Only paradoxical and intense?

Scientific explanation for deja-vu…it’s a short-circuit in the brain that makes you think you’ve experienced something before, when really, you’re only doing it for the first time.

Follow-up:

I suppose its merely a momentary chemical imbalance then eh? That is acceptable, I’m kinda concerned about the severity of it. I’m a bit more awake now and I remember it well. I can describe it metaphorically now:

It’s like I was rising up into the atmosphere, from inside a very tall building. When I reached the roof in this vertical tunnel (the normal s.o.p. of deja-vu for me, which I usually sit at for about a second before falling) I crashed trough it and climbed further, faster into the outer reaches where the air is thin and cold, with no clouds. I then topped out and started to fall. I descended in a blur back down into normal, active, not brain-tumored(?) consciousness. This whole ‘episode’ lasted about 10 seconds. It wasn’t anything like a blackout, more like a whiteout of a deja-vu. And the feeling of repeating memory was very disorienting, like re-writing something that was never written.

I have the same thing happen but the first time is always I and a dream, sometimes its just an exact match to what I’m doing and thinking that it’s scary because I’ll try to change it and then realize it was supposed to be that way anyways. but for me it’s kind of weird because sometimes it feels more like some fantasy my brain made up for me to believe because I’ve had it where my om will be telling me something and I remember it and recite exactly what she’s going to say in my head before she says it, and it isn’t a phrase or something she says all the time! weird huh?