Oh man, I've seen that clip a few times, it never gets old. But it speaks to who he was, I definitely could NOT handle that type of toxic load though he knew he could and that it was what he needed to do. There are various tribes around the world that use different drugs, including alcohol, to purposefully transcend consciousness to arrive at some truth. This guy knew his purpose was to push his mind and his body as far as they would go to discover something. I wonder if there was ever a time he was sober past a certain point in his life.