as for sleeping i dont generally find it a problem, even on nights when ive hit nearly a gram, generally about an hour after the last line i get a tiredness that sends me off into a deep sleep, usually with some quite vivid dreams. as for hallucinations ive only had it once when me and a mate hit it pretty hard one night, we were seeing stuff in a blank monitor screen, the strangest thing was we seemed to be seeing the same thing, even to the point of pointing out details that both of us could see. very unusual but not unpleasant