User blog comment:Metal Mario875/Mario's Feats Compilation 2/@comment-30294856-20171227005858/@comment-26374068-20171227010240

A rift is a crack or break in something. Therefore, being inside of a rift means you are outside of whatever the rift cracked or broke. "Dimensional" is a term relating to Metaphysics, as we know. Time and space are dimensions. So, a crack or break in time and space itself.

If you're inside of the crack, then, as said, whatever the crack was in is no longer around you. That would mean time and space are no longer there, either.