The InBetween
A subliminal alternate space existing between realities. This void existing between realities serves as a protective cushion/barrier to prevent them from colliding or interacting in any way. This space acts as a sort of mirror, reflecting back the realities it exists between. The "reflection" combines often random elements of both realities in a twisted or distorted way; and since this reflection is a visual echo, it often simply repeats the same basic structure/pattern of things over and over again.
Science fiction
It has existed since the first reality, multiplying as the first initial reality began splitting off and forming new realities.
Since an echo becomes more distorted the longer it goes, the laws of physics operate in a similar fashion. For example, gravity may be stronger or nonexistent in different areas of the same space; rain may rise from the ground into the sky, etc.
It varies from area to area in side the reflection, and from reflection to reflection.
PARKING GARAGES LIKE CMON MAN THEY SLAP HARDCORE
ALSO I CANNOT BE THE ONLY ONE WHO IS IN A LOWES AND IS LIKE, WHAT IF I COULD JUST LIVE IN HERE IT SLAPS