Usually followed by an epileptic siezure (blackout) in my case (Temporal lobe epilepsy)
First happened when I was 30yrs old , sort of like this , this has happened before , so has this , and this , smelled that before and this , next thing I knew someone asking me wtf happened there? apparently I walked past everyone in a zombie like state to a quiet place on my own. Can't remember this "blackout" but the aura stays fixed in my mind forever , bloody scary and not vey nice.
Now controlled with drugs but I still panic if I get the deja vu thing.
Go see yer Quack if it keeps happening , better safe than sorry.
Not trying to freak you out btw. 🙂
da funk