They cut their hair. They shifted from the lightning-fast metal of their youth in favor of a more hard rock sound. These are all the well-documented paradigm shifts that Metallica have undergone throughout their career.

James Hetfield, father of three, admitted to Australian media that the band has made a concerted effort to keep live shows as family-friendly as possible. In fact, Metallica axed profanity-riddled tunes like their cover of Anti-Nowhere League's 'So What' from the set list so as not to offend.