Where else?

[Little Rik]

Based on his research, Dr. Karl Jansen notes that "Recent advances in neuroscience are bringing us closer to a brain-based understanding of the NDE as an altered state of consciousness."[19] Jansen also determined that the effects of an NDE can be induced with ketamine, a hallucinogenic, dissociative anesthetic related to PCP. Jansen explains, "Ketamine administered by intravenous injection is capable of reproducing all of the features of the NDE which have been commonly described."

Regarding ketamine, Jansen quotes Doctors Grinspoon and Bakalar that "The dissociative experiences often seem so genuine that users are not sure that they have not actually left their bodies."[20] Jansen quotes Dr. Leary that ketamine use represents "experiments in voluntary death."[21]

Jansen's explanation of why ketamine and a near-death condition will cause similar effects is summarized as follows:

NMDA receptors in portions of the brain are important in cognitive processing and other functions. The same region of the brain plays a role in epileptic events and others in which cell (neuron) damage may occur due to the presence of glutamate (neurotransmitters). The use of ketamine prevents such damage. The brain might possibly release a neuroprotective counter-flood to glutamate similar to ketamine during catastrophic events. It is known, for example, that endopsychosins and magnesium and zinc ions naturally bind to the same (drug binding) sites as ketamine (the PCP receptor of the NMDA receptor). The hallucinogenic effects of ketamine are due to an NMDA receptor blockade.

Thus Jansen concludes "Near-death experiences (NDEs) can be reproduced by ketamine via blockade of receptors in the brain (the N-methyl-D-aspartate, NMDA receptors) for the neurotransmitter glutamate."[22] Most of this explanation is based on well-understood observations of neurological processes.

http://rationalwiki.org/wiki/Near-death_experience (emphasis mine)

Here we are with one more study that at the end say nothing new.  

Every idiots knows that drugs alter the normal consciousness so it is possible to enter a different dimension and feel so good regardless of the consequences that will follow.

As far as to see God no way but you still can enjoy his outer circle where everything is so good.
NDEs on the contrary do not have side effects and you can understand God and how the system works.