I've heard these fever dreams referred to as big-small as well. I believe it's the same phenomenon. For me it was pillars from high up above, where they're all the same width, but one is also much bigger at the same time. Hard to explain... Just an odd feeling.
And, anecdotally, I have gotten a similar feeling reaching deep enough meditation.
And, anecdotally, I have gotten a similar feeling reaching deep enough meditation.