Megadeth's Dave Mustaine joined Metallica onstage the other day to play songs from 'Kill 'Em All' with the band at The Fillmore in San Francisco, in celebration of Metallica's 30th anniversary.
And if that wasn't enough, the crowd were treated by Geezer Butler and Ozzy Osbourne also popping by to perform Sabbath covers that included 'Paranoid', 'Iron Man' and 'Sabbra Cadabra'.
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The Metallica 30th Anniversary Show set list is as follows:
'Through the Never'
'Ride the Lightning'
'The God That Failed'
'Welcome Home (Sanitarium)'
'Rebel Of Babylon'
'Dirty Window' (with Bob Rock)
'Frantic' (with Bob Rock)
'Sabbra Cadabra' (with Geezer Butler)
'Iron Man' (with Ozzy Osbourne and Geezer Butler)
'Paranoid' (with Ozzy Osbourne and Geezer Butler)
'King Nothing' (with Jason Newsted)
'Whiplash' (with Jason Newsted)
'Motorbreath' (with Hugh Tanner)
'Phantom Lord' (with Dave Mustaine)
'Jump In The Fire' (with Dave Mustaine)
'Metal Militia' (with Dave Mustaine)
'Hit The Lights' (with Lloyd Grant, Dave Mustaine, Ron McGovney)
'Seek & Destroy' (with Jason Newsted, Dave Mustaine, Lloyd Grant, Ron McGovney, Hugh Tanner, Mark Osegueda, and The Soul Rebels)