The next quarter of a second: There's no bright flash to blind her, and so she can actually see the shock wave spreading outward in a perfect sphere, hard and palpable as a ball of ice. Where the sphere contacts the street, it makes a circular wave front, making pebbles bounce, flipping old McDonald's containers that have long been smashed flat, and coaxing fine, flourlike dust out of all the tiny crevices in the pavement, so that it sweeps across the road toward her like a microscopic blizzard. Above it, the shock wave hangs in the air, rushing toward her at the speed of sound, a lens of air that flattens and refracts everything on the other side. She's passing through it.