Groove-metal kingpin joined New York thrashers onstage over the weekend
Bay Area metal icon guests on Polish death-metal act's latest single
Former Exodus guitarist Rick Hunolt also made a special appearance
Robb Flynn and Co. rage against police brutality with two-song single 'Civil Unrest'
"It's a sad song about relationships gone bad, but accepting that it's over, and making yourself move on."
Watch episode 4 of our "Rise Above" series
"It warms my soul to hear a man that angry!"
"You don't need to buy my records. But I also don't need to please you."
"If you don't wanna come out to the show because of it, that's cool, man"