Torture scenes

These website contain information about the best torture scenes. I am going to research them and find out what makes them good.

http://unrealitymag.com/index.php/2009/09/09/10-of-the-most-memorable-torture-scenes-in-movies/

http://www.filmschoolrejects.com/opinions/the-10-best-torture-scenes-in-american-cinema.php

http://www.voxmagazine.com/stories/2007/07/19/top-five-movie-torture-scenes/