I've only been under once, and it was the strangest thing: I had an out-of-body experience. When I woke up, it was like I had two sets of "memories" (for lack of a better word): one was nothing (like you describe), and the other was the OBE. I presume that I wouldn't have been able to notice the span "nothing" (because it didn't contain any time or space references as I can tell) at all if there wasn't a sort of parallel overlay of the OBE.
By the way, this hasn't led to me drawing any particular conclusions about the nature of reality or consciousness. I didn't find it useful to hold a particular set of beliefs about these things before the event, and that didn't change afterwards. If anything, it just presents more questions.
By the way, this hasn't led to me drawing any particular conclusions about the nature of reality or consciousness. I didn't find it useful to hold a particular set of beliefs about these things before the event, and that didn't change afterwards. If anything, it just presents more questions.