Death Cab For Cutie’s Ben Gibbard and Chvrches’ Lauren Mayberry had never met each other before they appeared on The Talkhouse Music Podcast together last week. But the two share a cause; they recently issued a joint statement about North Carolina’s deeply shitty anti-trans bathroom law, pledging to turn their respective North Carolina shows into benefits. And now they’ve shared a stage, as well. Last night, both bands played at Volvo Car Stadium in Charleston, South Carolina. And during Death Cab’s set, Mayberry came to the stage and sang lead on Death Cab’s Plans song “Brothers On A Hotel Bed.” She sang like someone who’s been listening to Death Cab records for a long time — which, come to think of it, is how she always sings. Watch a fan-made video of the performance below, via Pitchfork.

Pitchfork also points out that Gibbard had an uncharacteristic onstage freakout last night. Mid-song, the Death Cab frontman ripped off his guitar and earpiece, shoved his microphone stand over, and stormed offstage. You can watch video of that below, too.

Gibbard and the rest of the band reportedly returned to the stage and finished the show shortly thereafter.