In his book, "Kundalini, the Evolutionary Energy in Man," by Gopi Krishna, he says :
"The sudden awakening of Kundalini in one whose nervous system has reached the ripe stage of development as a result of favourable heredity, correct mode of living, and proper mental application, is often liable to create a most bewildering effect on the mind.
The far-reaching effects of this immensely augmented flow of a new form of vital current into the cephalic cavity through the spinal cord before the
system becomes fully accustomed to it may be visualized by considering the effects of a sudden increase in the flow of blood to the brain such as faintness, complete insensibility, excitement, irritability, or in extreme cases, delirium, paralysis, death.
I knew I was dying and that my heart could not stand the tremendous strain for long. My throat was scorched and every part of my body flaming and burning, but I could do nothing to alleviate the dreadful suffering. If a well or river had been near I would have jumped into its cold depths, preferring death to what I was undergoing.
I decided to bear the internal agony until the end, which could not be far off. "
You had a near death experience with scorpion bites and you mentioned a shaman who survived a rattlesnake bite; both during a peyote experience. Gopi Krishna was certain he would die and I know of people who thought that they were dying after ingesting sacred mushrooms and ayahuasca.
Some say the person, referred to as Jesus, was a shaman. Could the saying "to be born again," be quite literal, that the "resurrection" must be while one is alive and that one must get to the point of death and accept the outcome, before understanding just what is meant by spirit?