Today's the day! The new career-spanning box set from the Steve Miller Band Welcome To The Vault is out and earlier this week Steve was on The Tonight Show starring Jimmy Fallon to promote the release. Steve also revealed how he made up "Pompatus" from the song "The Joker," as well as learning to play guitar behind his head while doing a split from T-Bone Walker, and then he wrapped with a performance of "Fly Like An Eagle" with The Roots.