i too have experienced somthing similar... when i was a kid i would have all sorts of nightmarish dreams, and the most common one was me falling down in to an endless pit.. which would make me get up cause i couldnt control the pressure felt on my body because of the free fall.. everythin stopped for till recently.. now im gettin back those dreams.. but in this case i im havin problem wid vision.. where i can see things..but in an distorted way.. where im thinkin of me bein schizophrenic.. like the other part is cuming out and now im sharing multiple visions.. or like there is come parallel universe and im lookin at wat the other me is seeing.. god knows.. when i get up there is like this jet-lag kinda feeling which keeps me messed up for some time...