In four batches, process the orange juice, milk, sherbet and bananas in a blender until smooth. Pour into glasses.
Cut a hole in the corner of a pastry or plastic bag; fill with whipped topping. Pipe a ghost shape on top of each beverage. Position chocolate chips for eyes.
Cook's Tips: You could also use can whip cream and sprinkle with cinnamon for a Fall drink, or colored sugar for a summer drink. To make it even simpler, pipe the "ghosts" onto waxed paper, set the eyes on and freeze them. All you have to do then is drop them on the tops of the drinks!