It's the latest in his "Metal on instruments that aren't metal" series, which also includes a Cannibal Corpse cover on ukulele and System Of A Down on cello. He observes: "If I wasn't going to play Slayer on my banjo, then what did I buy it for?"

Scallon says he makes his living out of his YouTube channel, telling Billboard: "The War Ensemble video was the one that really took off. It's a lot of fun so I've been doing it since."