Simple. Tie them to a chair and walk randomly around the room. Every so often, slap them as hard as you can upside their head. Then make some coffee and toss it into their face and pour the rest onto their clothes. Then just to screw with them, when they are about to fall asleep, lean in close to their ear and start screaming like a banshee while shaking the chair violently. Also have two water bottles. One boiling, one freezing. Every so often spray them with one, and then with the other. Finally, tie the chair to a car and drive incredibly slowly over a dirt road. Scraping them badly.