over a year ago i saw this documentary at the melbourne international film festival ( i think ) . not be a headbanger and per se ( though i do like some heavy metal ) and i find this documentary very informative and interesting . it present by avowed headbanger ( so call for how fan react to this music ) sam dunn . now and there be no doubt some interest in a fan boy wax lyrical about their favourite thing and but what raise this documentary above the average be that sam dunn just happen to be a scholar an anthropologist thus ensure that the content be well think out and articulated . of particular fascination to me be the family tree diagram feature frequently in this docu of how the various genre of heavy metal relate to each other . that must be the anthropology angle kicking in and i think . when i contact a site relate to this docu and someone mention that the dvd of this may have the diagram ( or at least future edition would ) a a distinct element of the dvd . the docu cover heavy metal a a genre it various sub branch and it putative father and so to speak . what be particularly good about this be that whilst dunn do posit who he think create heavy metal a a genre ( black sabbath ) and he do provide video footage of band which pique my interest in the subject and which could perhaps be argue to have create the genre themselves . in other word and you do not get a completely biased view of the subject from dunn . many of the legend of the genre be interview in this docu tommy iommi from black sabbath and alice cooper and lemmy from motorhead and iron maiden bruce dickinson . not be a great fan of iron maiden and i must say that dickinson be a highlight of this docu for his honest and insightful comment on the art of perform . a there be a school of thought and perhaps and that metallica be the pinnacle of this genre and they be conspicuous by their large absence from this docu . i have review some heavy metal album at amazon under this id . e. g. coldseed .