probably not the sort of thing that comes up in a general conversation. i expect theres a few more out there with similar experiences.
before i was diagnosed i use to try to compartmentalize my bad experiences but save them for future reference. I had a delete section of my mind where i would put anthing unuseful. this was about 1994 to 1996. it wasnt like talking to another person or yourself it was like trying to program your own mind by thinking it what you wanted.
another thing was when i saw a paticular flash of colour like a small green spec in my vision would sence it was my mind telling me something like "advance" for instance. white was remember, red was danger i think, blue was caution.
about the existence thing, it was something that i haven't done since because it wasn't a nice feeling plus i take some pretty heavy meds which seem to kick in whenever i feel a bit anxious or stressed.
when I was in hospital i had some pretty nasty things happen in and outside of my mind and at one stage my mind was racing round so fast i heard a physical pop and it felt like someone was ringing (twisting) out my brain much as you do a dish cloth or flannel. I kept saying to the nurse I need to stop thinking but I really could not do that no matter how much I tried. they stopped it by wacking me with some tranquilizer injection that would put me out for about 2 days.
I think our minds are a damn sight more powerful that we realise and could be capable of some unexplainable things.
Another example was a time i was waiting for something cant think what but i was sitting comfortably about 4 feet away from a large fish tank.
I was going throught an extreme psychosis so this will sound weird.
I concentrated on different fish telling them with thought only to move in a certain direction {forward, left, right} or stop. it was odd that they seemed to be doing as i instructed. i had a break and came back and tried again the same result happended. Now logically to me this is impossible and the fact that i was ill backs this up again. my imagination most likely?
it was strange experience. hasn't happended since but I will not forget it real or not.
sorry to go off topic but this is good therapy
