Fire up the Cliché Counter: Guy taking an "easier" job with "regular hours." Invocation of torture soundtracked by chopped-up sample of stock demon shriek. "I'm fascinated by … pain." "He's ex-military; special forces, judging by his tactics." "He wants the world to suffer." Serial killer divulging everything that drives him over a nice phone chat, sometimes in a weird voice. "Are you having fun?" "You are sick and twisted." "You're taking this personally." "You have a very … pretty … wife." Intense mention of the gates of Hell. "I am going to enjoy this." "We've gotta get inside his head." Explosion. And yet, you watch, because you know Matthew Fox is in this, facing off against Tyler Perry, and looking disgustingly nightmarish.