It happened during an encore performance of 'Lovelight' during Bruce Hampton's 70th birthday concert at the Fox Theatre Monday and he was surrounded by fans, fellow musicians and friends.

As the guitar solo ragged on during the jam session, Hampton collapsed slowly to the stage's floor, hanging partially over an amplifier. That's where he stayed for at least three minutes before anyone rendered aid.

READ | Atlanta artist Bruce Hampton collapses on Fox Theatre stage, dies after tribute

Musician and friend Jeff Mosier was on stage when it happened. He later posted a video on Facebook talking about the concert and Bruce. Mosier said he thought Bruce was joking.

"Bruce looked like he was jokingly worshiping...the young guitar player and he got down on his knees and we all, you know I was getting ready to do the same thing..."

"Bruce didn't get up," he said in tears.

The 70-year-old was later pronounced dead, according to the Fulton County Medical Examiner's office.

Mosier said anyone in the crowd at Hampton's last concert should consider themselves lucky. As for him, "I'm going to choose gratitude and I was lucky to know him and I was lucky to be there. And the last words he said was 'get out, get out there Mosier' and we did, everybody got out there."

Photos | Bruce Hampton's last concert at Fox Theatre

Fans and some people who didn't know him reacted to the way Hampton died, surrounded by music.

The Tedeschi Trucks Band posted a statement on their Facebook page from Hampton's family asking for privacy.