And what better soundtrack to prepare for the four bringers of tonight's metal apocalypse—Metallica's James Hetfield, Lars Ulrich, Kirk Hammett and Robert Trujillo— than their own ripping ode to Armageddon, "The Four Horsemen." Although Metallica won't hit the stage for hours, the excitement is palpable among this hometown crowd of old thrashers, young longhairs, weekend warriors and metal chicks, all of whom have come to see Metallica kick out a fiery set of old and new favorites pulled from a quarter-century of classic metal—from their 1983 debut, Kill 'Em All to last year's epic Death Magnetic.