Ok, so today I'm a fundamentalist. Should I celebrate?
This is from a Dr Jansen a Dutch scientist who carried out a 13 year long study into NDE's.
According to Dr. Jansen, ketamine can reproduce all the main features of the NDE, including travel through a dark tunnel into the light, the feeling that one is dead, communing with God, hallucinations, out-of-body experiences, strange noises, etc. This does not prove that the NDE is nothing but a set of physical responses, nor does it prove that there is no life after death. It does, however, prove that an NDE is not compelling evidence for belief in either the existence of a separate consciousness or of an afterlife.
So clearly if a drug can mimic an NDE it must have something to do with neurochemistry. You may want to fly a helicopter before you have learned to fly a kite, I choose to keep my mind open.