I'm totally fascinated that DMT resides at brains center and is released at time of death to assist in shutting down of the system with ease (lights tunnel heaven)as well as small amounts while sleeping 'the stuff' dreams are made of.Start here:
https://www.rollitup.org/t/the-theory-of-relative-motion-and-natural-purpose.855821/page-2#post-11194638
End when you see the following: