[quote=@Source]
<Snipped quote by Stabby>

Nah, I'll learn about it as everyone else does.
Twilight Zone is similar to non-dimensional space, since subconscious elements become physical.
[/quote]

Ah, ok.
[hider=long, babbling explanation]
And it's less that things become physical, but moreso that they're represented by their existence as a thought, concept, or sentient creature, and that they can be perceived because of this. If something can't exist as any of these things, then it will cease to exist in non-dimensional space unless perceived by something that can acknowledge its existence as a one of those three.
[/hider]


Honestly I'm still figuring out how to describe it, but the tl;dr is that unless perceived as existing by a sentient entity that enters non-dimensional space at around the same time, a non-sentient object or entity will cease to exist once no one can observe it from outside of non-dimensional space.
Also there is no concept of "direction" in that void. If you move, you just randomly start appearing in other relatively nearby locations until you stop.