I've listened to the podcasts and read some articles and this is the first time I looked at the forums - this post caught my eye.
What you describe sounds a little bit like something I have occasionally experienced - mostly as a child in fever dreams, but once or twice as an adult. Where I'll be laying an bed half conscious and sort of feel huge and dangerous and unweildy but then thin and fragile and delicate - it's combined with a feeling of unease and slight dread.
Also related is at times when I get very tired I reach a point where it's like I lose my depth perception and everything looks very far away or very close up, like I'll feel like I can just reach out and grab something that is actually several yards away, or that something right in fornt of me is miles off.
Possibly related to something called Alice in Wonderland Syndrome (no joke)
Alice in Wonderland syndrome - Wikipedia