On Sunday, video evidence came out that Wild Flag had included a cover of Fugazi‘s “Margin Walker” in its set in Boston. Covering Fugazi in Boston is one thing, but covering the band within D.C. limits and not bringing your A-game is a riskier proposition. “Maybe 5 percent of you will know this song,” said singer/guitarist Carrie Brownstein at the end of the band’s sold-out 9:30 Club show on Monday. “And I have the flu, but we’re going to play this because they would have if they were in the same state.” Very obviously giving it everything she had left and then some, Brownstein and Wild Flag did themselves and their post-hardcore heroes proud, providing a righteous ending to an already killer show.

See photos from the show in the gallery.