Possibly one of the most profound questions of life is, what happens when we die? Common sense would suggest that we can never know until after we have died. Materialists would argue that obviously nothing happens as when the body stops functioning, there can be no more experience.
However, people do technically die for a period of time and come back to life and they report quite amazing and seemingly impossible things.
The experiences of people when they die have many common features: they often find themselves looking down on their bodies; they report going through a tunnel of light; meeting a being radiating love; meeting deceased relatives; having a life review where they experience the emotions of all the people they have interacted with; and often an experience of a strong reluctance to return to their body.
The experience is usually described as being hyper-real, of being more real that everyday reality, and of being timeless. The experiences are also very impactful and often have dramatic and positive life changing effects on the experiencers. In short they do not manifest any of the attributes that are associated with hallucinations or dreams.
During the out of body phase when they are looking down on their body, there are many cases where the person has described exactly what was happening and what was being said around their lifeless body. This has included the conversations surgeons have had as they operated on their body whilst it showed no signs of any brain activity.