'Near Death Experiences' Probed
"They'd laugh at you they'd think you were making it up. I think I was dying and for some reason my time hadn't come my name had been wiped out of the books and I was sent back." In a pilot project, Dr Sam Parnia, a registrar at Southampton General Hospital, studied sixty three patients who were resuscitated after cardiac arrests in the casualty department. All were clinically dead as staff tried to get their heart started again. They weren't breathing, had no heartbeat and there appeared to be no brain activity.
Ref. https://news.bbc.co.uk/1/Hi/health/1685311.stm
Finding that people all have a similar experience does not mean that they really had this near death experience. In fact, many near death type experiences, and ufo abduction experiences can be reproduced in a lab with just magnetic waves and other types of stimuli. But since you can't really test what the brain does right before you finally die, near death experiences cannot be proven, merely believed.