I can relay one that my mother had. She told me this story a few years ago:
When she was little, like maybe 11 or 12 I think she said, she was playing outside one late afternoon. She lived in Montreal, Quebec so it was very cold. She was already kind of sick or something and ended up staying out til after dark. My grandmother brought her in and put her to bed. The next morning, my mother was really sick, and ended up staying in bed for several days. At one point, she said, she was shaking uncontrollably, and was experiencing severe aching pain all over her body, and her mother was beside her.
Then, as she puts it, all the pain suddenly stopped. She said it was the clearest, most pure ecstasy she’d ever known, and she noticed that she was looking down at her self, motionless, from one of the corners of the ceiling. She said she felt as though she were being tugged upwards, almost like a strong current in a river or something. But she couldn’t stop looking at her mother, who was crying hysterically, of course. She said the strangest part of the whole thing was that as soon as she wished she could be with her mother again, she was immediately back in bed looking up at her mother, and all the pain returned to her.
She’s sure that she was dead for that experience, and that she experienced the beginning of the process of death. I don’t necesarily agree that she was dead for that time, I tend to go with the lack of oxygen to the brain theory that has been said to be responsible for several NDEs.