#27, Jemimus, your description is exactly what I experienced when I was younger too, except it wasn't limited to sleep/wake times.

We had giant polished granite columns in my high school, and I remember walking by one and getting this feeling of overwhelming denseness. I put my arms around it and felt uneasy.

That was actually the last time I can remember it happening, and at the time it was "nostalgic" for me--at that point it hadn't happened to me since my childhood, when they were full on panic-inducing, rather than merely uncomfortable.