An out-of-body experience (OBE or sometimes OOBE), is an experience
that typically involves a sensation of floating outside of one's
body and, in some cases, perceiving one's physical body from a place
outside one's body (autoscopy).
The term out-of-body experience was introduced in 1943 by G.N.M
Tyrrell in his book Apparitions, and adopted by, for example, Celia
Green and Robert Monroe as a bias-free alternative to belief-centric
labels such as "astral projection" or "spirit walking". Though the
term usefully distances researchers from scientifically problematic
concepts such as the soul, scientists still know little about the
phenomenon. Some researchers have managed to recreate OBE in a
laboratory setup by stimulating a part in the human brain. One in
ten people has an out-of-body experience at some time in their
lives. OBEs are often part of the near-death experience. Those who
have experienced OBEs sometimes claim to have observed details which
were unknown to them beforehand.