Last night on the Late Show With David Letterman, Tenacious D came through to play "Roadie," a "Jukebox Hero"/"Turn The Page"-style dedication to the mic-check engineers who skitter around the stage during soundcheck. The band also made an NSFW seven-minute short film around the song, starring Danny McBride. Watch the Letterman performance and the video below. [videoembed size="full_width" alignment="center"][/videoembed] The ...