I would watch them as they bleed, and allow their wounds to become sickly infected. Once infected, I would go to the small pharmacy around the block and get two pieces of ice and a bottle of Ibuprofen. I would then proceed to cut four of the Ibuprofen pills into half, and rub four of the halves with one piece of ice and the other four with the last piece. Finally, as I watch the pain become tolerable for them without the pills, I would jam the eight halves of Ibuprofen into their mouth and allow them my final mercy.