Mumford & Sons disguised themselves at Bonnaroo for video

If you were at the Bonnaroo Music & Arts Festival in Manchester, Tenn., a few weeks back, chances are good that you saw British folk-rockers Mumford and Sons play a triumphant two-hour set on the festival's biggest stage.

But you may also have seen them elsewhere at the festival: on the Ferris wheel, or the water slide or giving high-fives to passers-by. You just might not have known it was them.

Before their big performance, the quartet spent their afternoon running amok through the festival grounds — in costume. Frontman Marcus Mumford was Robin Hood, and his bandmates were Maid Marian (we're assuming), a chicken and a fox (perhaps a Disney reference?).

Their adventures were filmed for the band's new video for "The Wolf," which also features footage from their Bonnaroo performance and backstage glimpses.