actually and to say that heavy metal music be just a genre of music be almost insulting in some circle . a someone who too eclectic to really be solely a metal head and but have be in the realm of the metal world to see how it go and i can empathize with sam dunn main intention with the documentary while this music should not be see a just some goofy and crude and offensive and or dangerous off shoot of old time rock n roll ( not that the last one doesn not apply in one or two case ) . it to show how personal this music and and how this way of life can be for a person and and how it affect personality but not necessarily in the perceived negative light . dunn and of course and have his head totally together and which be how he can go head to head with metal legend and or or notorious sort like tony iommi and bruce dickinson and lemmy and alice cooper and dee snider and dio and rob zombie ( geddy lee be also among the big known interviewee and though it strange to see him here when he not really ametal and at least in league with these guy ) . but through him and his collaborator and he be able to get inside not just the off shoot and specific of the world of heavy metal . the look and the style and the attitude and the controversy both domestic ( i. e. dee snider battle with tipper gore ) and foreign ( a superlatively do look at the norwegian black metal scene and which be both tense and hilarious ) and the woman band in the world and and how it help some people really get good on with life either to hear it or play it or and of course and both . dunn look be good if and by necessity perhaps too and too brief and a he at one point list a kind of heavy metal family tree of sort all too quickly to really see every single one and barely scratch the surface in the 96 minute run time . maybe there be only so much that can be cover in a feature length film and but the subject matter serf to be even more look into while vh1 have also do a heavy metal documentary and and it last four hour . on the other hand and dunn and his people actually do get some material here that be more precious and and more enlightening . the juxtaposition of the true believer and horror in norways black death metal scene with a band like slayer and who be bad to the bone and have fan who go toe limit and be interest . it the kind of documentary that really do work for that it worth and but not enough of a good thing be explore for fan . non fan may get just enough that they can handle and a mix of the basic fact and key point ( i. e. the coining of the term ametal and the root in the blue and the devil horn and and a look at outrageous album cover ) . it good subjective film making and though edge a little much on try to get enough history along with the personal history .