Michigan concertgoers got a bit of a fright Sunday when a fan collapsed onstage at the Detroit stop of Katy Perry’s Lifetimes Tour.

The incident took place during the “Choose Your Own Adventure” segment of the show, when Perry traditionally invites audience members to accompany her in a performance of a fan-selected song from her catalog.

Footage of Sunday’s show, captured for posterity by Michigan-based outlet MLive, shows Perry welcoming four young fans, including one who identifies herself as McKenna, to the stage at Little Caesars Arena.

After a brief introduction, the 13-time Grammy nominee tells the fans they’ll be joining her in a live rendition of “The One That Got Away,” at which point McKenna collapses to the ground, prompting many in the crowd to gasp audibly.

Watch footage of the incident below.