WILD FLAG is a Portland, OR and Washington, DC based quartet consisting of Carrie Brownstein, Mary Timony, Rebecca Cole, and Janet Weiss. (This fansite has no affiliation with the band.) twitter updates:
…finally Carrie pushing Mary’s head down so that she falls over and all we can see are her boots up in the air as she continues to play from the floor. When she stands up, Carrie takes a picture, quick enough to still get Mary giving her a playfully pissed off face and the middle finger, and even without seeing the shot on facebook hours later you can tell it was unscripted, spontaneous, and fun.