haven’t you been reading the news? that is called waterboarding. when a person is waterboarded they feel like they are drowning and believe they are about to die. the reason why torturers prefer this method is because it leaves no physical trace of the incident (no water in the lungs), but it does torment the waterboardee.
read all about what waterboarding is and its effect on people here:http://en.wikipedia.org/wiki/Waterboardi…