A dangerous drive! - S1.E7

Randy draws a picture of Grandma who lives in Cleverland, but decides to take it to her rather than posting it. On their way, they are chased by a big truck. They learn that it is actually a hippopotamus that had turned into a truck, and it was lonely. Randy and ChaCha become his friend. All this takes up so much time, and they finally decide to mail the drawing to Grandma.