Johnny Hickman has provided “bonehead guitar riffs,” memorable songs and a spark-plug energy to Cracker since the band debuted more than 30 years ago. Hickman and primary singer-songwriter David Lowery already were friends from Redlands, Calif., when Lowery called him after the implosion of his band Camper Van Beethoven. The ever-lively Hickman digs into the bounty of riffs, hooks and wit that went into Cracker’s self-titled debut album, which includes “Teen Angst (What the World Needs Now).” How did the band raise the bar with Kerosene Hat, propelled by the hits “Low” and “Get Off This?” Why did the formidable rhythm section leave, prompting Cracker to move to the “Steely Dan model”? What’s the story behind Hickman’s arrest after wielding his 1977 Les Paul as a weapon? Listening to Hickman play or speak is a cure for feeling low.