Editing Out-of-body experience (section)

==Spontaneous OBEs==

===During/near sleep===

{{Main|Sleep paralysis}}

Those experiencing OBEs sometimes report (among other types of immediate and spontaneous experience) a preceding and initiating [[lucid dream|lucid-dream]] state. In many cases, people who claim to have had an OBE report being on the verge of sleep, or being already asleep shortly before the experience. A large percentage of these cases refer to situations where the sleep was not particularly deep (due to illness, noises in other rooms, emotional stress, exhaustion from overworking, frequent re-awakening, etc.). In most of these cases subjects perceive themselves as being awake; about half of them note a feeling of [[sleep paralysis]].<ref name="oberf">
{{cite web|url=http://www.oberf.org/sobe_stories.htm |title=SOBEs |publisher=Oberf.org |access-date=2011-10-06}}
</ref>

===Near-death experiences===

{{Main|Near-death experience}}
Another form of spontaneous OBE is the near-death experience (NDE). Some subjects report having had an OBE at times of severe [[physical trauma]] such as near-drownings or major surgery. Near-death experiences may include subjective impressions of being outside the physical body, sometimes visions of deceased relatives and religious figures, and transcendence of ego and [[Spacetime|spatiotemporal]] boundaries.<ref>{{cite journal | author = Greyson Bruce | year = 2003 | title = Near-Death Experiences in a Psychiatric Outpatient Clinic Population | journal = Psychiatr Serv | volume = 54 | issue = 12| pages = 1649–1651 | doi=10.1176/appi.ps.54.12.1649| pmid = 14645808 }}</ref> The experience typically includes such factors as: a sense of being dead; a feeling of peace and painlessness; hearing of various non-physical sounds, an out-of-body experience; a tunnel experience (the sense of moving up or through a narrow passageway); encountering "beings of light" and a [[God]]-like figure or similar entities; being given a "[[life review]]", and a reluctance to return to life.<ref>Mauro, James. (1992). ''Bright lights, big Mystery''. Psychology Today.</ref>

===Resulting from extreme physical effort===

Along the same lines as an NDE, extreme physical effort during activities such as high-altitude [[climbing]] and [[marathon]] running can induce OBEs. A sense of [[bilocation]] may be experienced, with both ground and air-based perspectives being experienced simultaneously.<ref>Metzinger (citing Alvarado), 2005 "Out-of-Body Experiences as the Origin of the Concept of a 'Soul{{'"}}, ''Mind & Matter'' 3(1), p. 65.</ref>