Elmore James had one immortal lick: the staccato-and-downhill slide riff. "But it was a great lick," says slide guitarist Derek Trucks. "There was something unleashed in his playing, that acoustic guitar with the electric pickup. When he's singing, you hear his voice through the electric pickup." James' tone inspired guitarists: "I practiced 12 hours a day, every day, until my fingers were bleeding, trying to get the same sound as Elmore James got," Robbie Robertson said.