This post seems relevant as well: http://www.preposterousuniverse.com/blog/2014/04/08/chaos-hallucinogens-virtual-reality-and-the-science-of-self/
This post seems relevant as well: http://www.preposterousuniverse.com/blog/2014/04/08/chaos-hallucinogens-virtual-reality-and-the-science-of-self/