Anthrax just wrapped up their run in support of Iron Maiden in South America, and they had a surprise in store for fans at the show in São Paulo. Sepultura‘s Andreas Kisser joined the thrash titans on stage to perform “Indians” and a snippet of “Refuse/Resist,” and you can check out fan footage of the moment right here! We’ve all seen Andreas jam with these guys many times before, but not on this scale! The crowd was MASSIVE! Check it out below!