Whenever Neil Young plugs in, fuzz-caked guitar rock is sure to follow. His boldest live moments came with Crazy Horse—his 1991 version of “Rockin' In the Free World” is an onslaught of piercing notes and throbbing walls of distortion. “Southern Man”—recorded with CSNY—allows him to stretch out, boasting beautiful, jazzy improvisations with Stephen Stills.