Roger

“While in general I avoid the use of torture - torture locates the opponent and mobilizes resistance - the threat of torture is useful to induce in the subject the appropriate feeling of helplessness and gratitude to the interrogator for withholding it. And torture can be employed to advantage as a penalty when the subject is far enough along with the treatment to accept punishment as deserved. To this end I devised several forms of disciplinary procedure. One was known as the Switchboard. Electric drills that can be turned on at any time are clamped against the subject's teeth; and he is instructed to operate an arbitrary switchboard, to put certain connections in certain sockets in response to bells and lights. Every time he makes a mistake the drills are turned on for twenty seconds. The signals are gradually speeded up beyond his reaction time. Half an hour on the Switchboard and the subject breaks down like an overloaded thinking machine.”
― William S. Burroughs, Naked Lunch: The Restored Text