Brian Johnson has been chatting about some of the unexpected risks that come with being singer for AC/DC.

Johnson told Fox News that for three decades he’s been burned every time the cannon fires during “For Those About to Rock We Salute You.”

“I could write a book about standing under the cannon for 30 years,” he said. “These horrible sparks come out of them – at the end of the show I have burn markets all over my shoulders.”

Johnson also discussed his pre-gig warm up routine: “I just go into the bathroom, make a big loud noise and then come back to the boys and say. ‘Well, that’s me ready’.”

(Andrew Vaughan, Gibson.com)