Depersonalization derealization disorder
Depersonalization/derealization disorder is a type of dissociative disorder where depersonalization and/or derealization occur.
Depersonalization is feeling detached from reality, from one’s own body or self, but without loss of sense of reality - it's a spooky feeling.
Derealization is a sense of unreality or detachment from, or unfamiliarity with, the world - feel as though in a fog or a dream or that the world is unreal or a movie.
An episode of depersonalization or derealization can be as short as a few seconds to as long as a few years.
50%+ of adults experience brief, mild, stress-related derealization. This is considered normal and doesn't necessarily mean someone has D/D disorder.