Boy do I have a story for you guys - this just happened to me in this morning's dream.

I was in a very vivid surreal 3d environment/world, sort of 3d nature in shades of blue/purple, where I did stuff like catch a beautiful butterfly and it turned out to be quite sticky. All the while I was saying stuff like "I do not belong to this reality" - not sure if that was the exact phrasing - stuff like "your reality doesn't correspond to my own". I then began constructing a teleport/portal to my own world (construct in the strategy game sense of the word where the construction is abstract and happens automatically), I accidentally built 2, however instead of teleports I built like a playground+hut x2. I was surprised by this "glitch" and thought this could be a dream, however I don't think I did a proper RC and soon forgot about the possibility of this being a dream.