Near Death Experiences - non religious views about life after death

Researchers
Moody and Greyson
What do many NDE have in common?
Out of body experience/floating
Light at the end of a tunnel
Void of darkness
Angels/other beings
Voices
Meet dead relatives
No fear of death
BBC Documentary ‘The Day I died’
Pam Reynolds: The experience seemingly occurred during a complete shutdown of her brain and body functions that had been instigated purposely to allow delicate surgery on a brain aneurysm. It included accurate views of the operating room and equipment, hyper-awareness, visions of light, and interactions with deceased relatives. Her case is regarded by many as convincing evidence of survival, since her vital signs were monitored continuously, providing certainty that she was clinically dead at the time.
What are the alternative explanations?

1. Supernatural - It is the work of satan/devil
2. Scientific
   a) Pharmacological - Caused by drugs
   b) Physiological - Lack of oxygen to the brain in death causes brain to create this NDE
   c)Neurological - Caused by malfunctions to the nervous system in death
3. Psychological
   a) Isolation - People can experience strange phenomena similar to NDE when exposed to long stretches of extreme isolation eg shipwrecked sailors and those on polar expeditions.
   b) Dreams/hallucinations/delusions - wishful thinking/fantasies