A fine-looking chestnut bronc receives the name scorpion when he explodes unexpectedly after several days of unusually good behavior. "That horse, " A cowboy says, "Is going to be either mighty good or mighty bad." Tim, ...A fine-looking chestnut bronc receives the name scorpion when he explodes unexpectedly after several days of unusually good behavior. "That horse, " A cowboy says, "Is going to be either mighty good or mighty bad." Tim, an outlaw on the run, trades his tired horse for scorpion.