Mastodon guitarist Brent Hinds has been forced to bow out of supergroup Giraffe Tonge Orchestra's upcoming shows after breaking his leg in a motorbike accident.

He's posted a picture of his strapped-up limb on Instagram, explaining: "Broke my fucking leg starting my motorcycle, goddamnit.

"Sorry to all the shows I was about to play with GTO and West End Moteal and Fiend Without A Face.

"Life's a bitch then you die. Happy thanking!"

Giraffe Tongue Orchestra also features William DuVall of Alice In Chains and Ben Weinman of The Dillinger Escape Plan, alongside Dethklok's Pete Griffin and former The Mars Volta member Thomas Prigden.