Imagine that you are sitting on a train or something and waving to your friend, then the train starts moving. You sit there all by your self or maybe with some people. You are looking out the window. Green grass as far as you can see trees swiftly passes by. You enter a tunnel, its getting dark but you still feel great. Since you got so good memories from the place you`ve been.
Well not that im gonna decide what you should imagine or not, just a little thought that i got.
Hope you enjoyed the song :D