Come for the jams, stay for the inventive songwriting, and return for these left-field gems. Shout along to the ska-flavored prog-pop of "Golgi Apparatus," enter the space-rock mothership with "David Bowie," and savor "Scent of a Mule," with its high-velocity electric bluegrass. If you still need a classic-rock fix, look no further than "Blaze On."