No Age have been known to cover Black Flag’s “Six Pack” in concert, but L.A.’s post-shoegaze punk duo got a chance to experience the real deal last night. Newestra reports that Chuck Dukowski and Keith Morris – both founding members of Black Flag – joined No Age on stage following their set at L.A.’s MacArthur Park. Under the banner No Flag, the quartet then went on to perform a six song set, barreling through cuts from 1978’s Nervous Breakdown EP, as well as “No Values” from 1980′s Jealous Again. Naturally, chaos ensued. We have your video evidence below.

Morris also gave a speech: