In this funny nod to Chicken Little, a quiet afternoon on the farm might be the scene of a barnyard disaster waiting to happen. When Duck runs around the farm shouting "DUCK " to the other animals, they grow exasperated as they haughtily explain to Duck which animal is which. Unfortunately, something is falling from the sky. But perhaps "DUCK " isn't the best warning. Perhaps what Duck should have said is . . . "RUN "