Review: Sam Dunn a metal fan and anthropologist takes you on a journey through the life of Heavy Metal music from its grass roots to current day and discussing to some point almost all genres and sub-genres of Heavy Metal. Interviews with legends in metal like Bruce Dickinson, Alice Cooper, Lemmy,  Tony Iommi, and Ronnie James Dio and with members of newer bands like Slipknot and Lamb of God. He takes you around the world to Wacken festival in Germany, to Norway to delve deeper into the Norweigian Black Metal scene, to California to discuss the hair metal scene of the 80's. Me being the age I am, this documentary takes me through almost all stages of my metal listening history. I think any listeners of Heavy Metal will get something out of this. Disc 2 features extra interviews that did not get in the main movie featuring even more Metal monsters including one with the late Dimebag and brother Vinnie. Also features interviews with people outside the metal world like Ministers, sociologists, music writers, a groupie and a Satanist. A great view and would interest even the non metal fan and maybe give them insight on why so many people like it and even why so many people don't. A must see for any Metal fan.