The rigorous and grueling Hollywood Vampires touring schedule finally caught up with Joe Perry, which led to his onstage collapse, according to bandmate Alice Cooper.

Perry was stretchered to the hospital at Coney Island in New York after staggering off stage right before collapsing behind the scenes.

"It scared the hell out of me." The lyrics to "Raise the Dead," the first song we played that night, go, 'Cardiac, heart attack, they never feared the reaper,' and I look around the stage and he's gone. He was lying behind an amp on his back, and I went, 'Oh, my God.'

We didn't know what happened until after the show."

"Aerosmith does two shows a week, but we were on our eighth show in nine days, and I'm used to working like that.

I'm used to working an hour and 40 minutes or two hours, five nights a week. I was in shape and so was Johnny and everybody else.

I think Joe was not ready for that kind of pace."