It used to happen more often when I was younger, but I was always alone and laying down.
During times when I was alone with my thoughts, I would stare at a wall or inanimate object in the room and "zone out". Sometimes, though, the objects in the room would appear to rapidly changes shape and size, from extremely bloated and round to stick thin. Back and forth and back and forth for up to an hour. Everything took on a strange, soft and warped texture.
It always gives me a strange feeling, like I'm claustraphobic. I get dizzy most of the time. It still happens, but not as often now that I'm well into my teens.
The only thing I've read that is remotely close to this experience is the oh-so-rare Alice in Wonderland Syndrome, but I have a hard time believing this is what that is. There are similarities, yes, but not enough to fully convince me.
I do suffer from OCD and Anxiety, which have been noted as links or triggers to the syndrome. If it's not Alice in Wonderland Syndrome, what is it?