Like so many great blues artists, John Mayall's magic truly comes out in his live performances. Whether he's burning down the joint on a mid-'60s R&B jumper like "Crawling Up a Hill", grooving through a brass-fuelled soul jam on “A Helping Hand” or launching his guitar into the stratosphere on a cover of T-Bone Walker's classic “They Call It Stormy Monday”, Mayall's raw take on the blues set the genre on fire.