the drum machine - and the guitar work, as well. kids nowadays are going to hear the mars volta in it, but in/casino/out hadn't even been released yet. i could cite santana, but i'd be lying. it was i mother earth....
the live version of this on earth, sky, and everything in between is also killer.
(relevant tracks: teenage jesus, to spin inside dull aberrations, various tracks in the guitar solo playlist)
http://www.youtube.com/watch?v=VgGlQHpnvMc