Animal instincts, animal extracts. Bone powders and bone grinds. Strike the bone against the flint. Forty-degree angle, eight hundred pounds per square inch. Extract a blade. Fasten the blade to a branch. Becomes a spear. The spear enters flesh. The spear enters bone. The spear sits behind an inch of glass. The spear glimmers benign under spotlights. Eyes click in their sockets, following its edge.