Clip 1 is a snippet from a documentary on psychedelic science, that discusses the benefits enjoyed by religious ayahuasca users in Brazil.
Clip 2 Is from SHAMANS OF THE AMAZON
A Documentary by Dean Jefferys, and includes a commentary from the late entheogen guru Terrence McKenna
http://gerulf.acsu.unsw.edu.au/~raven/
http://www.shamansoftheamazon.com/
