Grateful Dead musician Bob Weir fell onstage while strumming his guitar at a concert in Port Chester, N.Y.
Video posted online shows the 65-year-old musician collapsing Thursday night during a performance with Furthur.
He was quickly helped off the floor as the crowd cheered him on. He didn't leave the stage after falling and instead started playing again after crew members helped him into a chair.
Lesh told the crowd later in the set that Weir had been suffering from a strained shoulder.
Weir is on tour with Furthur, the band he formed with fellow Grateful Dead member Phil Lesh.
A representative for Furthur didn't immediately respond to an email seeking comment.
The band's next show is scheduled for Saturday in Atlantic City, N.J.
The YouTube video is below. The fall happens :55 into the clip as the group sings "Unbroken Chain."