The answer(s)
2017-08-12: Yes, it really exists.

2017-08-12: It seems that everyone has this experience minimum once in a lifetime, but not everyone is aware of this experience. (???)

The story
A near-death experience (NDE) is a profound personal experience associated with death or impending death which researchers claim share similar characteristics. When positive, such experiences may encompass a variety of sensations including detachment from the body, feelings of levitation, total serenity, security, warmth, the experience of absolute dissolution, and the presence of a light. When negative, such experiences may include sensations of anguish and distress. Explanations for NDEs vary from scientific to religious. Neuroscience research suggests that an NDE is a subjective phenomenon resulting from 'disturbed bodily multisensory integration' that occurs during life-threatening events, while some transcendental and religious beliefs about an afterlife include descriptions similar to NDEs.

Link on Wikipedia
https://en.wikipedia.org/wiki/Near-death_experience

Link on YouTube
https://youtu.be/peE-A-VlUtw

Other links