Their next album would be the glossy, gazillion-selling breakthrough, but on Master of Puppets Metallica didn’t bother with hooks or pop discipline. Instead, on their final recording with bassist Cliff Burton (who would die in a tour bus accident) they reinforced everything good about heavy metal (the velocity of the playing, the emotional release of the vocals) while undermining at least a few of the cliches. The title track was unmistakably anti-drug—”Chop your breakfast on a mirror/ Taste me you will see/ More is all you need/ You’re dedicated to how I’m killing you” — while they also got in digs at the military industrial complex and head banging conformists.