Quote Originally Posted by fOrceez View Post
Sounds like you're talking about hypnagogic imagery.
Agreed! this sounds to me like self hypnosis, or else a form of binural-induced state of meditation. Basically, you're not exactly asleep, but just in an altered state where the subconscious is easily influenced by the conscious mind and can create the effects of some very immersive lucid imagery. Not quite insanity, but cool!