A woman complained to the service manager of an appliance firm that the push-button ice maker and dispenser on the door of her new refrigerator was popping ice cubes on her kitchen floor-all by itself. A serviceman could find nothing wrong with the appliance, but the woman continued to complain that ice cubes were littering her kitchen. Finally, a supervisor arrived, determined to stand watch in the kitchen until the mystery was solved. He had been there about an hour when a German shepherd entered, stood on his hind legs and pressed the ice-maker button. Ice cubes rained on the floor, and the dog gobbled up most of them.