Sevenfold (another old shame) and eventually Black Sabbath , Sabaton , Manowar , Helloween , Finntroll , Arkona , Forefather , Falkenbach , Nachtmahr , Saxon , Nachtmystium ... The point is that I can't possibly approach Metal: A Headbanger's Journey neutrally. Thankfully, director Sam Dunn doesn't just recognise that: he