U2 opened the first show of their European summer tour, at Olympic Stadium in Turin, Italy, with the unknown and the familiar. The first song was a brand new, unfinished number, "Return of the Sting Ray Guitar." It was so new it didn't have a real ending — the band just stopped playing after four minutes of a hard pneumatic groove, driven by the Edge's crunching-fuzz guitar.
But that riff and power came with a reassuring sight: Bono, on stage for the first time since he underwent spinal surgery nine weeks earlier, strutting along the whole outer rim of U2's giant stage. He often stopped to do boxing-dance moves, throwing punches like a fighter happy to be back in the ring
U2 Live in Italy: David Fricke Reports | Rolling Stone Music