Before You Die: in Moriche Village Deep Within the Venezuelan Amazon by Richard Newton

In Moriche village deep within the Venezuelan Amazon, sit on a veranda and allow a Piaroa Indian armed with a blowpipe to fire a wodge of hallucinogenic yoppo up your nose. The initial blast is not dissimilar to inhaling half a swimming pool. When the drug kicks in, don't be surprised to find yourself talking to the trees - what's more, the trees will probably talk back.