Judging by the raw, hard-hitting focus of "Rope," the lead single from Foo Fighters' forthcoming seventh studio album, "Wasting Light," Dave Grohl and company must have spent the last four years dusting off Grohl's Nirvana output. Nostalgia has recently loomed large in camp Foo: Since 2007's Grammy Award-winning "Echoes, Silence, Patience & Grace," Grohl recaptured his drum throne with hard rock supergroup Them Crooked Vultures, and bassist Nate Mendel reunited with Sunny Day Real Estate. It only makes sense, then, that former guitarist Pat Smear is once again a full-fledged Foo, making his first appearance as such since 1997's "The Colour and the Shape." "Rope" blasts through the gate with delayed guitars and a speaker-busting wave of distortion. "Give me some rope/I'm coming loose," Grohl sings with throaty menace, ducking for cover before an eruption of psychedelic wah-wah. "Rope" makes the listener feel like it's 1995 all over again.