Bob or Tom came up with the idea: "Look out your window, the grass ain't green ..." and I said, "It's kinda yellow ..." then somebody else said, "See what I mean?" So then we got the next bit: "Look up your chimney, the sky ain't blue, it's kinda yellow ..." It became a joke almost every time the third line came, it kept being "yellow". It's quite funny because the last words are, "Look into the future in your mystic crystal ball, see if it ain't yellow ... see if it's there at all."Traveling Wilburys (26 May 2007). The Traveling Wilburys Revisited. BBC Radio 2.
