This has happened to me three times. The first two times I thought it was from "nodding" on opiate type drugs. It just happened sober though.

When I was lying down closing my eyes for a minute (with color) I thought I was at a lone bus stop by a gas station in the train, it was blurry but almost real and I forgot reality and though that was reality. I relized that it was not real and I snapped out of it but I stayed with my eyes closed and didn't move.

I then proceeded to see what seemed like totally black but it was a space of black (hard to explain) like I was in somewhere with no light. Then I saw darker shadow figures as misty floating everywhere around me so kept passing on and some kept moving. At this moment I could still feel my bed and I knew I was in the real word (it was alot different then dreaming) but it felt like I was seeing a different place with my eyes not fully open. I wanted to move around in this place but I knew if I tried I would like literally move in reality I tryed to move and "open" my eyes "in my mind" i guess would be the best way to describe it? It was very out ofconnection/blurry like I wasn't fully there. It doesnt sound like a dream so I can think It could be lucidity but it was really wierd.