He was never going to make it

Toni felt for a pulse in Daisy's neck. It was there, but weak. "She's still alive—just." Craig said, "I've got her gun. It's empty, anyway." They were all right, Toni decided. She looked ahead to the crashed Mercedes. Kit had climbed out. She ran toward him. Stanley followed close behind. Kit started to run away, along the drive, heading for the woods; but he was battered and shaken by the crash, and he ran erratically. He was never going to make it, Toni could see. After a few paces he staggered and fell. He seemed to realize that he could not escape that way. Scrambling to his feet, he changed direction and turned toward the cliff. Toni glanced into the Mercedes as she passed it. Nigel lay in a crumpled heap, eyes open with the blank stare of the dead. That accounted for the three thugs, Toni thought: one tied up, one unconscious, and one dead. Only Kit was left. Kit slipped on the icy drive, staggered, regained his balance, and turned around. He took the perfume spray from his pocket and held it out like a gun. "Stop, or I'll kill us all," he said. Toni and Stanley stopped. Kit's face was all pain and rage. Toni saw a man who had lost his soul. He might do anything: kill his family, kill himself, destroy the world. Stanley said, "It won't work out here, Kit." Toni wondered if that were true. Kit had the same thought, and said, "Why not?" "Feel this wind," Stanley said. "The droplets will disperse before they can do any harm." "To hell with it all," Kit said, and he threw the bottle high in the air. Then he turned around, jumped over the low wall, and ran full tilt at the cliff edge a few feet away. Stanley jumped after him. Toni caught the perfume bottle before it hit the ground. Stanley leaped through the air, hands stretched out in front of him. He almost got Kit by the shoulders, but his hands slipped. He hit the ground, but managed to grab one leg and grip it tight. Kit fell to the ground with his head and shoulders jutting out over the edge of the cliff. Stanley jumped on top of him, holding him down with his weight.