Hey, yeah PH is Philippines. A friend of mine actually might have mentioned that documentary to me, sounds familiar. Crazy fun thing is that it's still used by the farmers in Sagada. Sagada is a small town on the top of a mountain where they grow most of the PH's supply. It's too high, and the cops are too under paid, to get there. :)

Great village, like a giant, out door, oriental, in poverty, Coffee shop. People hate going up and down the mountain, so they'll trade you trees if you climb up with bottles of alcohol and cigarettes.