Put them in a dark room...
Small puddle of water on the floor with a slight electric current running through it, not enough to kill but enough to make you want to pick your feet up off the ground...
Play sounds of a rabid animal, and slowly fillet their skin with a small Gillete razor.. Then when the cut is large enough to place a slice of a citris fruit inside their skin, you place it inside, and stitch up the wound.
Then you flash a blinding red light all of a sudden into the room, and then spray them with luke warm water, and place them on a plexi glass table, pour honey over them, then untie them, and place them outside, where they could escape if they tried, and let them tear their skin from the glass, then repeat as necessary..
