As if seeing "The Big Four" bands in concert wouldn't be mind blowingly awesome enough, Metallica  stepped it up a notch.

In case you're not quite sure what "The Big Four" I keep talking about is, they're The "Big Four" bands of 1980s thrash metal, Metallica, Megadeth, Slayer, and Anthrax.  If you know me you know I'm a huge 80's metal fan!

Towards the end of Metallica's set at one of their "Big Four" concerts last night, Megadeth, Slayer, Anthrax, and members of Diamond Head joined Metallica on stage and all joined in on playing Diamond Heads song "Am I Evil".  As if a concert with those bands isn't enough they stepped it up a notch and all performed a song together, and I'm pretty sure if I had been there my mind would have been completely blown.

I found this really cool article about them playing the song if you want to check it out!

Check out the video!