This is a clip from American Drug War: The Last White Hope, a very important documentary about why we should end the War on Drugs.
American Drug War (Pre-Release Cut)
American Drug War (Official Site)
American Drug War on Facebook
The medicinal benefits of magic mushrooms and other psychedelics is only one small aspect of their argument.
See also:
MDMA and Psychology
Salvia Madness
Terrence McKenna Audio Online
John Lennon Describes his First Acid Trip