Metallica performed an unreleased song from the "Death Magnetic" sessions Wednesday night during the second of four shows at the legendary Fillmore in the band's hometown of San Francisco.  The shows are only open to members of Metallica's fan club, and are part of the band's celebration of its 30th anniversary as a band.  The YouTube clip below contains a rough-mixed version of the song.  Commented the band:  "We're pretty excited to be bringing these songs back to life nearly four years after they were recorded. Once again, this is the unpolished version of the song... the original rough mix from March of 2008 in its rawest, untouched form."