I may have experienced this. Abstract thoughts that join together and make some sort of a story, but not sensible. Not related to senses.

I sometimes explain them using sensible descriptions, but that's just the way i describe something that i experience.

It's like... "Surface", "lack", "chesshorselike movement", "mirror-like self reference", or things like that, which cannot make sense in waking life. What i just said isn't even close enough to describe it. It's just pure thought, detached of reality-reference. Weird.

Am i close to what you mean?