‘The traditional ibogaine ceremony of eating the ground root bark is a rite of passage for all males in the Bwiti tribe. They use it as an oracle. We have adapted it as a treatment for the diseases of the western developed world, like PTSD, trauma and depression. When an 18 year-old enlists in the military and conducts sanctioned violence for 20 years, they sometimes can’t get out and live a normal life without these psychedelic interventions.

‘On ibogaine, the participant often perceives that they can see through their closed eyelids and the eyeshade. I see them starting to peek through the eyeshade, and wave their hands in front of them to verify, and there’s disbelief at first. It can feel like a superpower, but also terrifying, because you can no longer hide from your visions. You can also see beings you know, or humanoid creatures. The ibogaine can also take on a voice and an entity that can be in dialogue and answer questions. And you can experience a life review, like a projected home movie, with your life memories and trauma.

‘I myself experienced being able to see the room through closed eyes and eyeshades, then I saw a six-foot-tall humanoid with a goat head. I could walk around and look away and look back, and it was exactly where and how it should be in 3D. These beings will often tend to you for the entire visionary experience.

‘The ibogaine asked me if I wanted to know how I would die. I am a death doula and comfortable around my own death. I said no, because I don’t want it to take away the surprise. It said, good answer, and moved on.’

Colm Walker is a veteran and the executive director of The Mission Within psychedelic retreat, where the patients we are studying at our Center for Psychedelic Research and Therapy (at the University of Texas at Austin) go for their ibogaine and psilocybin treatment. He shares his background and a description of their program, and what a typical ibogaine experience is like. Then we talk about a strange phenomenon that is allegedly common on ibogaine: being able to see through closed eyes and an eye mask, and we discuss the prospect of seriously scientifically studying it.