Varney operated one of two 5-ton cranes in a factory. Both cranes were to act simultaneously in lifting a 9- ton machine. The other operator was busy elsewhere, so Varney, who was in a hurry, tried to...

Varney operated one of two 5-ton cranes in a factory. Both cranes were to act simultaneously in lifting a 9- ton machine. The other operator was busy elsewhere, so Varney, who was in a hurry, tried to lift the machine with his crane alone. The cable broke after the load was 10 feet above the floor, and a worker who happened to be walking under the crane but who had nothing to do with the operation was injured. Has the worker a valid cause of action against Varney?