On a steamy August night in a dark space bursting with Brooklynites and other humans, a DJ steps to the decks. It’s the third installation of the Lights Out series at the Knitting Factory, and Detox Unit is about to blow minds. Ascending into the corner of the room, Joe Roberts knows what’s cranking inside the spanking Hennessy Sound System before him. He knows forwards and backwards the material he’s prepared - detailed, meticulous, dirty, and deep. He knows when the music meets the medium, sound speeding through wire and circuitry, he’ll ignite the sell-out crowd like a tinderbox.