Scaphism, and Other Tortures

If one is looking for something absolutely vile to introduce to a game setting, something to truly disgust and to put the player characters on their heels, then look no further than the wikipedia entry on "Scaphism."  Read more here!  But also, perhaps, acquaint yourself with the "10 Most Torturous Methods of Execution" as outlined by Smashing Lists here! (WARNING: Not for the squeamish!)