Rat really wasn't a cruel person. He really wasn't interested in making people suffer needlessly. This guy was certainly in a lot of pain.

"Hold still," he told him. He put a hand on his chest, a bit unexpectedly gently. He began to sing softly to himself. But he raised the knife one last time. The song wouldn't be enough for this guy. He leaned over him, and gripped his hair firmly and tightly. With one quick slice across the neck, he wasn't in pain anymore.