For the latest installment of Resident Advisor’s RA Sessions series, veteran techno producer Alli Wells (a.k.a. Perc) has joined forces with metal vocalist Dan Chandler. Appearing live in RA’s London office, the pair delivers an extended version of “Take Your Body Off,” a performance described as “harsh, relentless, and fueled with raw aggression…not for the faint of heart.” The track was originally released on Perc’s The Power and the Glory LP, which dropped earlier this year via his own Perc Trax imprint, and featured Chandler—a former member of London outfit Dethscalator—as a guest artist. Perc and Chandler’s collaborative session can be watched below.