Longfellow the Giraffe warns the friends to be careful going over some broken road. But Clara Cluck the duck friend doesn't listen to insructions and thinks it is fun when he wobbles over the bumpy road. He persuades Mickey to try it, but Mickey accidentally backs into Pluto at the water tower and gets his mouth wet. Poor Mickey must wait for his mouth to dry out. When Clara Cluck overhears Pluto saying that Mickey has lost his mouth, Clara Cluck misunderstanding and heads off across the Island of Sodor Salty explains the misunderstanding to Clara Cluck and the duck friend understands that to be a Really Useful friend, one must listen carefully and alway to follow directions!