"Sorry Sydney for a short set tonight but Vince had to be rushed to the hospital for internal pain, " bassist Sixx tweeted.

CNN: Kidney stones force rocker Vince Neil from stage

"Sorry Sydney for a short set tonight but Vince had to be rushed to the hospital for internal pain, " bassist Nikki Sixx tweeted.

CNN: Kidney stones force rocker Vince Neil from stage

He called the hospital to alert staff they likely would be getting injured people, then rushed in to coordinate preparations.

NPR: Doctor: Dead Bomb Suspect Had Wounds 'Head To Toe'