Rating: 10 / 10 (if you’re a Metallica fan) Rating: 8 / 10 (otherwise) During the opening scenes of the new concert / video montage / Anarchy-gone-berserk film Metallica: Through The Never, a young roadie named Trip (Dane DeHaan) is making his way backstage before a Metallica show. He first passes singer/guitarist James Hetfield, who glares at…