The rolling hills are symbols of challenges we must face, but which can be overcome with effort. The pinecone on the staff is a symbol of the Maenads, a group of Dionysus-worshippers who really knew how to party hard and also sometimes kill people. The bus is a promise of opportunity, the promise that you can go anywhere and everywhere in the multiverse when you step onboard – your destination might not be up to you, but you can jolly well make the most of it!