Download the Big Four of Thrash's Performance of "Am I Evil?" Free on iTunes

If you're a fan of Metallica, Megadeth, Slayer, Anthrax or all four, then you might want to make your way to iTunes this week.  A free download of a video of the "Big Four of Thrash" playing Diamond Head's song "Am I Evil?" during an encore performance at the Sonisphere festival in Sofia, Bulgaria is now available. 

The video comes from the forthcoming DVD/Blu-ray of the concert, which is in stores on November 2nd.  A special edition box set will also be released that day that includes two DVDs containing the entire concert, along with five CDs that house every song that every band played. 

Check out footage of The Big Four performing "Am I Evil?" below. CAUTION: some profanity can be heard.