Psychedelics are definitely interesting. I recently came across Ibogaine (http://www.erowid.org/experiences/subs/exp_Ibogaine.shtml ) derived from roots of the iboga tree. Surprisingly many experiencers report to have seen a man point towards a door or convey some messages to them in their 36hr long trips!
A substance that can give very similar results to multiple users is definitely worth the research.
A substance that can give very similar results to multiple users is definitely worth the research.