So, every once and awhile, something really weird happens to me. My perception of size becomes distorted. (It has nothing to do with any sort of drug)

Either I feel very small and the world feels very large, or I feel very large and the world feels very small. It's actually a visual change as well. For example, somthing within arms reach, may appear to be two yards out of reach, and the other side of a room may appear to be an extra 20-30 feet away. If I close my eyes a few times, the illusion disappears. It rarely happens, but it has happened to me off and on since I was a kid. I suppose it should be a little disturbing, but it's actually quite cool. I know it's an illusion when it happens too.

Is this an actual hallucination, or what is it? I guess I never really thought it was abnormal.