Two bass players walk into a hotel room… is Robert Trujillo, who, prior to joining Metallica, played with Suicidal Tendencies and Ozzy Osbourne. The other? Sam Dunn, formerly of Burn to Black and currently the guy on BangerTV who asks the deep questions. Sam and Rob sat down before Metallica’s sold-out club show to discuss Hardwired….to Self-Destruct, its killer track “Spit out the Bone,” and the role of bass in heavy metal music.