“He’s gesturing wildly to us and finally he gets the courage to come over. He says, ‘You guys are sitting on the pyro!’” The time Ozzy Osbourne almost blew up Tom Morello and Slash

Slash Tom Morello Ozzy.

When Ozzy Osbourne turned to Tom Morello to curate the historic Black Sabbath Back to the Beginning show – which will also be available to livestream when it happens next month – he did so with good reason.

After all, The Prince of Darkness and the Rage Against the Machine electric guitar hero go way back, so there was no one better placed to direct what will be both Ozzy and Black Sabbath's last-ever show. However, their friendship nearly went up in smoke in 2015 – rather literally.