A near-death experience is a personal experience associated with death or impending death. Have you ever had one, hopefully not!
I have not, but that sounds very scary.
They say there can be a feeling of detachment from the body, levitation, total peace, security, and/or the presence of light. 
I cannot even imagine how that would feel. what causes this?
They believe being that close to death comes from disturbed bodily multisensory integration. Basically the sensors in us are on overload 
That is so interesting. I hope I never experience that.
I hope not either. Now the last explanation was the science definition. Religious beliefs say it's the crossing over into the afterlife the people just don't make it all the way.
That one makes a little more sense. What else do you know?
Not a lot more. I do know there was a study about it in 1892 and they deemed it a clinical syndrome. I don't think that's what it should be labeled as.
Yeah I agree a clinical syndrome is not an appropriate explanation.