@xris,
Xris, this particular event has been put under a catagory of
disassociated arousal in the course--as is most usually, but not only, the case--the sleep cycle. Even papersthat I have come across, by those who particularly focus on this area, have little to say about it; research continues. One slightly humorous comment was, '
if you try to fly, and are successful, then you were in REM sleep'--thus dreaming in the regular way.
The point being, regardless of the neurological and possible psychological underpinnings of lucid dreaming, it is still only an internal reality. Also, in that most all people will experience some degree of such as they fall off into stage one, or come out of 3, or 4, into REM, then into more of an awake and alert state, heavy lucid dreaming is very rare, overall--therefore it implies some sort of 'not-supposed-to-be' pathway/mapping realignment (or something of that possible sort). That, in and of itself, one must conclude does not (and in what I have read, is not) imply a 'mental illnes.'