Michael Fassbender is a renowned metalhead, this we already know. In the past, he has expressed love for Iron Maiden, Metallica, and Slayer among others. So when Fassbener hit up The Tonight Show with Jimmy Fallon, Fallon thought the best course of action would be an air guitar battle. Fassbender does a mean "Crazy Train" air guitar, and even pays tribute to Iron Maiden bassist Steve Harris.
