i felt it sometimes... when i was younger i used to meditate, and try to induce out of body experiences... then many times i felt like i was awake, but could not move. and i could feel like i had two bodies, one lying and one "floating"... its hard to explain... and i could feel my eyes very heavy, as if they are closing, like when im very very sleepy... sometimes i felt that 'presence'... cant say if was good or evil... for me was just a strange presence there... and every time i felt it i was lying on my back... i thought it was annoyng, but not exactly scary.

PS. rottenPaul, did you read Castaneda?