i be pleasantly surprise to hear lamb of god playing over the intro to this long awaited documentary . i fear another hard rock metal synopsis . the content range be wide enough to give newcomer a pretty good appreciation of the whole metal family and include both glam and shock rock 70 or 80 band as well a some heavy stuff from slipnot and slayer for example . have say that and a a more hardcore metalhead i personally have less connection with band such a venom or alice cooper than the enquire outsider who may be watch this film out of curiosity . a a result i be a little frustrated at point in the lack of discussion over hallmark act ( pantera aren not even mention ( . ) ) subsequently i think that if this film be intend for people to show to their parent or mate to illustrate metal in general and then it score highly ( although the old story about satanism and black metal be a little over do we have hear all that before ) . if you do know your metal and the film do little more than make you feel warm inside ( the final voice over be quote excellently . ) personally i watch this film mainly just to make sure that metal be not be deface on screen a have happen many time before i have no complaint .