I have been wondering about this for a while. Is it so that out of body experiences are actually lucid dreams, but for ones who doesn't know it, might interpetate it as an OBE? Another thing, many OBE's are told by people who has been operated, so they have been under narcoses. Could it be, that the activity in the brain during narcoses are way higher than what it would be in a dream, and therefore, many OBE's might seem as very very realistic because it feels more real than a normal lucid dream under such drugging?