Forget Morgan Spurlock, the hottest new documentary maker is an unassuming Canadian named Sam Dunn. Along with Scot McFadyen, he has produced the year’s most exhilarating doc – and it’s all about metal.

Following the genre from its very beginnings, and including interviews with all of the movement’s major players, Metal: A Headbanger’s Journey is an absolute necessity for annoying with even a passing interest in heavy guitars and the vigorous banging of heads, and if not – what the fuck are you doing reading this mag?

Beginning with an argument over who can truly claim to be the first metal band, and taking in pretty much everything from metal’s relationship to opera, the use of the devil’s tritone, the infamous court cases of the 80s and more than a little hero worship, it’s an epic production. But did it feel that way while making it?

Sam Dunn director of Metal A Headbangers Journey