Legendary rocker, 73, seen using the oxygen mask behind the stage in shocking video

For the iconic Judas Priest -Frontmann Rob HalfordThe show has to go on … even if that means using an oxygen mask!

In a video that shared Tikok from Turn On Thursday, May 8th, the legendary heavy metal singer held an oxygen mask in his face and breathed deeply into it while he was behind the stage and was dressed in his trademark of black leather and tunnel. At some point the 73-year-old held a hand in the devil's sign and in the mouth “Metal!”

“What do you get when you are at 2,640 height, 15,000 fans appear and sing on your lungs? … Metal!” Read the text overlay in the clip.

Although it is not clear where or when the video was shot Metal hammer Why Judas Priest does not appear alongside a number of other legendary heavy metal bands in Black Sabbath's last show that will mark the end of Ozzy OsbourneCareer.

“I had no idea that it happened!” Halford said and found that Judas Priest had already played for the 60th anniversary show of the Scorpions when Black Sabbath's last concert was announced.

“Everything was announced and was a big deal – scorpione and priest – and suddenly I get this call [from Sharon Osbourne]: 'Robbie, I know that you have this appearance with Scorpions, but you could consider doing something with Ozzy and the boys to see you, recalled Halford and admitted that he was “absolutely disappointed” to miss the event.

“However, all my friends will be there, great bands and artists,” he said. “It is a wonderful and epic moment for Sabbath and heavy metal-es again emphasizes that Birmingham is made of metal.”