Acid Flashback

Some of you may experience that after reading this article, or maybe you'll reach for some of those tattered Carlos Castaneda paperbacks and get reacquainted with Don Juan, that wily, shape-shifting trickster. Or maybe not, if you're already aware that Castaneda was a dark trickster of another sort. So in light of this history, I want to know less about The Atlantic author's psychedelic experience and more about the guy in her story, who goes from living in New York City and working for Pfizer to living in a thatch hut in the Amazon and becoming a shaman's apprentice. How does that happen?