Philly DJ/producer Flufftronix's locked in fifth gear and flying straight underground to the rave cave like Bruce Wayne in this mix, which hovers around face-pounding, black Kevlar dubstep before transitioning into gonzo anthems (including new fave "Sex Sax") and sproingy, upbeat fist-pumpers. Then it goes straight back into bassface (literally: see Flufftronix's own on track 24), all filthy, dubby low end that goes great when accompanied by a mean-mug. If we didn't already know that gritty Philadelphia was suspended in some kind of hardass, pre-apocalyptic dancefloor epoch, this mixtape would be a perfect telegram alerting us as much. Tracklist after the jump.