            As the emptiness of the sky loomed up, a mere hand-stretched away, Hermione skidded to a halt, falling to her knees at the very edge of the cliff. Trembling hands grasped the lip so she could lean over. Pebbles loosened, scattering, skating along the sheer wall of white rock. Hermione stared down. Her vision spun. The tide was high. Foam broke against the cliffside.