Sir Elton John sparked fears he had been assassinated on stage by a crazed fan – after he was left with blood streaming down his face in a shocking gig attack . The Rocket Man, 77, was hauled away from his piano in the middle of a concert in Greensboro, North Carolina , after members of his band thought he had been shot , Knewz.com can reveal. It later emerged a drug user in the crowd had chucked a metal hash pipe at him that struck him directly in the temple – causing the music legend to "