Blindly, she inched along a floor pitching as violently as the deck of a boat in a midwinter storm. Her hands touched the threshold opening onto the ninth floor foyer at the instant the glass transom over her head exploded into a thousand pieces. Reflexively, Amelia cast her right arm in front of her face, but not before blood spurted from her scalp and ran down her checks. She crumpled beneath the doorframe, curling into a ball. Amelia screamed again as a twenty-five-foot expanse of wood paneling and masonry pitched outward and plunged nine stories to Montgomery Street below. She knew that no structure on landfill, no matter how well built, could withstand much more shaking without collapsing. Then, just as suddenly, the convulsions subsided.