the coverage to McLaughlin Draying Company and its employees.
 The Pleasant Valley case, supra, first discussed and disposed of the basic problem in this state. There a truck driver drove a truck loaded with lima beans to a warehouse in Oxnard intending to unload the beans into the warehouse pits; he backed the truck onto a platform so that its front end could be sufficiently elevated to allow the beans to slide from the rear of the vehicle into the bin provided to receive them. The truck driver had been directed to the platform by an employee of the Pleasant Valley Lima Bean Growers and Warehouse Association, who had already placed two wooden blocks in front of two stationary blocks attached to the platform so that the truck'srear wheels would rest against the wooden blocks and allow the front of the truck to be elevated in such manner that the overhanging rear-end would be directly over the pit. The driver backed the truck into position, turned off the motor and got down from the vehicle, at which time the employee of Pleasant Valley, who was operating the machinery, raised the front end of the platform, and most of the load of beans slid into the pit. Some of them, however, were not dislodged, and the truck driver, standing at the rear of the truck with one leg over a pipe railing at the edge of the pit, tried to sweep out the remainder of the load. At that moment, the truck moved backwards, the rear