CBC News: Reports from abroad: Neil Macdonald: "The torture called waterboarding is a pretty violent business. The torturer straps down the victim, feet elevated above the head, then covers the subject's face — often with cloth or cellophane — and pours water onto it. This triggers the gag reflex, persuading the mind that the body is drowning, provoking an atavistic terror. The straining and flailing against the restraint straps can sometimes break bones. If the torture is protracted, lung and brain damage can occur."