But Dexsarin gas could never remain a compact cloud in the midst of a natural whirlwind. The bilious mist swirled up from the floor and wrapped itself around Georgie’s head. He snapped his mouth shut, but Hart opened it again with an elbow jab to his solar plexus. The man gasped, hauling in gas as he tried for air. The knowledge of what he was doing was clear in his eyes.