Between 1975 and 1979 the Khmer Rouge used a variety of water-based tortures at their prison camps which housed Cambodian civilians, suspected Khmer Rouge defectors, and at least one American reporter.
Which of the six variants were used on you?
I was completely immobilized and my entire face covered with a towel folded 4x. A water hose was running over the towel.
Do you fancy yourself an expert?