What does it feel like to die?

If the brain was intact during death a person goes into a phase of clinical death where the heart stops but the brain still works.

After clinical death occurs biological death happens if the person wasn’t saved. During biological death brain cells die.

According to some people who survived clinical death, they felt no pain at the time of going unconscious.

Scientists noticed that after death the brain remains active for some time

Some survivors of clinical death reported seeing a tunnel vision. Scientists believe this tunnel vision could be caused by the restricted flow of blood to the eye.

According to a Quora thread, the brain releases endorphin LSD which is a substance that makes a person enter a dream-like a state where the dream feels so real.

Many survivors of clinical death told stories where they have come out of their bodies and saw themselves on their death bed. Some scientists believe that those stories are the result of the dream-like state the brain enters. (See Study: Consciousness after clinical death)

Some survivors have described the moment of death as a moment where they slip away into a void.

According to a person who survived clinical death twice, dying is like a blank state or a short nap with no dreams or consciousness.

Many of those who survived minutes of clinical death said that it felt like they were gone for so long and not just a few minutes.

According to a nurse who witnessed many near death experiences, the bright light people see is common among 8% of people and it happens due to flooding of phosphenes from the Pineal gland. (See What does it feel like to drown?)