It's definitely unsettling. I can see where, if you've always had it, that it never struck you as being anything but normal.

For me it's new in the last couple of years, though with the M.S. and migraines, I've gone through a good amount of different neurological "things" over the years.

I get Alice in Wonderland syndrome migraines. Those are wild. Things appear larger/smaller than they should, and the ground feels like it's closer to my face/chin than it should be (like I've shrunk). Noticed it when I was still avidly walking every day (which I should get back into, perhaps now with the nicer weather, after we're moved into our new house, I'll get back to walking - a lot nicer neighbourhood).