Metallica have posted video of the now-customary "Big Four Jam" from the Sonisphere festival in Knebworth, UK. Metallica were joined on stage by members of Slayer, Anthrax, Megadeth and Diamond Head for a rendition of Diamond Head's classic cut, "Am I Evil?" Check out the video below.
You can check out a 17-minute MetOnTour video at Metallica's website .
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Josh Hart is a former web producer and staff writer for Guitar World and Guitar Aficionado magazines (2010–2012). He has since pursued writing fiction under various pseudonyms while exploring the technical underpinnings of journalism, now serving as a senior software engineer for The Seattle Times.

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