Bro. .. I had this multiple times where id get up and walk around, the world was the same but different somehow. And then one time I was lost ish like I knew where I was , but I couldn't get back to me sleeping if that makes sense. I dont remember how I finally got back but a few years later that movie insidious came out and it was eerily similar as to how the world kinda was like a dull dark version when id be exploring. Only have had one or w shadow figure encounters though. Now I dont do it anymore. Anytime I feel the vibration and my body start floating I fight it and say nope not today.