Proof of an afterlife, or simply that we really have no idea how the mind works? Via the Daily Beast, Dr. Eben Alexander recounts his trip to a higher plane of existence whilst his brain was shut down in a coma:
As a neurosurgeon, I did not believe in the phenomenon of near-death experiences. I understand what happens to the brain when people are near death, and I had always believed there were good scientific explanations for the heavenly out-of-body journeys described by those who narrowly escaped death.
In the fall of 2008, however, after seven days in a coma during which the human part of my brain, the neocortex, was inactivated, I experienced something so profound that it gave me a scientific reason to believe in consciousness after death.
All the chief arguments against near-death experiences suggest that these experiences are the results of minimal, transient, or partial malfunctioning of the cortex.