Band of Horses recently holed up at the lovely Pink Garter Theater in Jackson Hole, Wy. to rehearse for what promises to be a lengthy stint on the road (it's already mapped out through January) supporting their forthcoming second major label full-length, 'Mirage Rock,' and wouldn't you know it, surprise of all surprises: The cameras were rolling the whole time.

The live rehearsal clip posted above captures 'Knock Knock,' the first single off their forthcoming 'Mirage Rock,' out on Sept. 18, but other footage from the session is expected to turn up on the deluxe edition of the album. Fans who purchase the limited-edition deluxe set will also receive five bonus tracks, plus exclusive access to other behind-the-scenes footage of the band working with producer Glyn Johns in the studio.