Since I was a kid I frequently dream of what I consider a mirrored reality. Think of Silent Hill flipping between the regular world and the nightmare world. Although my mirrored reality isn't usually nightmarish at all save for a few events. I frequently visit mirrored locations of places I am or have been familiar with. It's very similar to reality with geography slightly altered in places and buildings being different. Cars also look slightly different.
I frequently encounter recurring people and we have slightly bizarre conversations or 'jobs to do', but the most recurring figure I have encountered in these dreams is a guy who identifies himself as Krick. The emotional sense he gives off is like a guy you knew in high-school who you weren't really friends with, but if you happened to be in the same place at the same time you would hang out.
For years he has been popping in and out of my mirrored reality dreams. I don't always dream of the mirrored reality, but when I do I am consciously aware I am in it. Whenever Krick pops in, it's kinda like whenever Jerry would encounter Newman in Seinfeld and he would do that begrudging "Hello Newman". He's not really an invited guest, but if he shows up I just kind've put up with him.
In the mirrored dreams I've also noticed time alterations, usually what I would guess as future-tense as I've seen present day locations in the mirrored world that have become dilapidated, overgrown or broken down. Seasons also tend to be random, sometimes it's winter and sometimes it's summer or fall.
A lot of the time I am just wandering around or driving in familiar areas with no real purpose, but there are more suspenseful dreams where I am supposed to be somewhere or supposed to be doing something. I also get occasional random cameo's in the mirrored reality dreams including having an in depth conversation with William Shatner, giving Harrison Ford directions and walking the girl that played as Winnie on The Wonder Years to one of the gates near my house.
That's another weird thing in the mirrored reality. There are spots where these gates will appear off and on, usually in the same areas but seemingly at random times. I know of at least five of these gates located around my general area. I know one of them will only appear when it snows. When people ask me where the gates go, I always tell them Interzone which I stole from Naked Lunch. But the gates either act like warps as in one dream we drove into one that warped us to a location about an hour away. Other gates take you to the place I call Interzone, but I don't really think it has a name but I've seen some messed up stuff there.