APOCALYPTICA. Perttu Kivilaakso reflects on more than 20 years of Apocalyptica Plays Metallica by Four Cellos; the support from Metallica over the years; seeing the S&M taping; playing the 30th anniversary shows; collaborating with members of Slayer, Sepultura, and Slipknot; artistic courage; life as a classically trained metalhead; and more.