What really has my attention is a character they introduce that listens/watches(hard to explain) to 1000s of dreams from lucid dreamers..they have these people set up like an energy grid, they are literally mapping the connections between dimensions (realities). Lemme explain how this works, cause I believe this is how reality actually works, to a point. Each dimension is a divergence from the one's inside it, and the ones it is within. the subtle differences will vary in intensity and in overall variance the further away from your "seated" dimension it is you wander (in dreams, NDs, etc) There will be certain places that for whatever reason, share the same space across all probable dimensions. They are spaces between spaces...spaces within spaces as the lady says

"then you were not really in that house"