Depends what you mean by "really happen"
My opinion (and the opinion of virtually the whole scientific world)
is that yes people experience these things, they feel as if they are leaving thier body. So on a perceptual level, the experiences are "real". However, when it comes down to the interpretation of what is really going on, that's where science and the believers diverge...
Science (and my own opinion) would say that these experiences are a form of dream, something related to a lucid dream... your brain is a master at modelling the universe.. we do it the whole time we are awake, and then we do it again whilst we dream. So it's not unlikely that sometimes people dream that they are leaving thier body... especially when those people already believe in a soul or spirit.
So people definitely have these experiences... just some people take the whole thing literally... they conclude that they ACTUALLY left thier body... rather than the simpler answer, that they just had some kind of mentally generated experience of leaving the body.
Simply put...
If i dream i win the lottery... It dosn't mean i won the lottery.
If i dream I leave my body... it dosn't mean i left my body.
However real the experience is... even if i am convinced at the time of the dream i won the lottery... I'll still wake up quite a bit poorer.
The dream is still a real experience, it's just a virtual experience. It happens only in our heads.
So really you have to ask yourself...
Which is more likely?
1) The brain doing what its really good at... making models of the world (dreams, hallucinations, our waking experience (because that is just a type of dream itself, one based on what our senses tell us))
Creating a virtual experience of leaving the body.
OR
2) An unproven, completely lacking in hard evidence, completely contradicting biology and physics "soul"... leaving the body and going to an unproven, completly lacking in evidence and contradicting physics "astral plane".
I'll hedge my bets with number 1
Bookmarks