Joe Perry’s performance during Aerosmith’s “Deuces Are Wild” Vegas residency has fans concerned over his health.

During their April 13th show, Perry was playing “Livin’ On the Edge,” Aerosmith’s hit track that has been played live for 25 years. The band’s Facebook fan page, Aerofanatic, shared the performance clip on social media along with the comment: “Ummmm…. Joe….what in the fuck is that? I’ve seen and heard The Admiral thru good times and bad, and this has me genuinely worried. I hope and pray he’s ok physically. And I say this not as a fan. I say it as a person genuinely concerned about the health and well-being of another human being. Maybe I’m overreacting, but my gut tells me otherwise.”

Watch the clip below.