"Now that's a nail," Blackwell said, "galvanized, one-and-a-half-inch, roofing. I've nailed men's hands to bars like this, with nails like that. And some of them were right bastards." There was nothing at all of threat in Blackwell's voice. "And some of those, you nail their one hand, their other comes up with a razor, or a pair of needle-nose pliers." Blackwell's forefinger absently found an angry-looking scar beneath his right eye, as though something had entered there and been deflected along the cheekbone. "To have a go, right?"