You could have saved the American taxpayers a lot of money and trouble.
You could have saved the expense of those specially trained torturers and all of that special fake drowning equipment and those special walls and torture neck braces.
You simply could have told the detainees that they have ALS. They would look at you with a quizzical look and you could have a physician (or a fake physician) explain that there is no cure. It's a downhill slide and is rather difficult. They may not last long and soon they will loose their ability to speak and eat and they'll have to deal with choking. The legs and hands and arms will start to go, too. They'll require the help of someone for most of life's most basic functions. You could hand them a discounted copy of Tuesdays with Morrie for details on those most basic functions. You could slip in the tidbit that they'll keep all their marbles and will be conscious and aware of every second of the decline. Oh, and you could mention that there is no facility or medical genius in the world that can stop ALS.
Now, that's torture!