While it doesn’t appear that Modest Mouse frontman Isaac Brock will be joining Broken Social Scene to rival the supergroup status of Thom Yorke & Flea’s Atoms for Peace, an awesome video of the former pair performing has surfaced. Last Saturday, Brock joined BSS on stage for a show in San Francisco to perform “The Good Times are Killing Me”. Rather than a flawless gem, the song was actually flubbed a few times and BSS + Brock get into little bantering rants which is pretty enjoyable nonetheless.