Pie-ing bandmates for birthdays is good for your spirits! Happy Birthday Mr Hammett!!!! #HardwiredToSelfDestruct#metallicapic.twitter.com/FRDE6jhnuD
— Metallica (@Metallica) November 18, 2016
It's a Metallica tradition, and we're more than happy to see it live on...
Kirk Hammett has revealed he felt somewhat left out of the songwriting process for 'Hardwired... to Self-Destruct,' calling it a 'very bitter pill to swallow.'