Just a few minutes before Public Enemy took the stage at Spin's 20th anniversary bash at New York's Webster Hall last night, Darryl McDaniels -- the rapper known best as DMC -- told the crowd about his first encounter with Public Enemy. "The first time I heard Public Enemy, it was on college radio," the hip hop legend said. "And when I heard Chuck D, it was as if God himself had come down from heaven and picked up a microphone." Truer words were not uttered onstage all night. Public Enemy's marathon set opened a seam in time back to 1988, the year It Takes a Nation of Millions to Hold Us Back dropped from the skies and turned hip hop from a curious underground phenomenon into a cultural revolution.