his hateful shout-outs were for the world to hear , as his toad army began their loud vocal chants again , it was the oddest of musical duets : `` ribbett ... ribbett ... ribbett ... ribbett ... ribbett ... '' `` ribbett ... ribbett ... ribbett ... ribbett ... ribbett ... '' `` ribbett ... ribbett ... ribbett ... ribbett ... ribbett ... '' `` ribbett ... ribbett ... ribbett ... ribbett ... ribbett ... '' backwards looking as broomstick crested a medium-sized hill louis could witness almost to the end of bramble forest where it backed up to the northumbria mountains .