The path between rock and comedy is laden with bad music and feeble humor, but it’s a road Electric Six tread recklessly. The single “Danger! High Voltage” is a sparkling disco parody featuring hysterically overblown falsetto vocals from the White Stripes’ Jack White (“When we touch! When we kiss”). When it was released by Flying Bomb, a garage-punk label, it incited hate mail from purist fans, which alone is a worthy accomplishment. Fittingly, much of Fire emulates and mocks the macho posturing of Neanderthal grunt-rock. “I’ve got something to put in you — at the gay bar!” singer Dick Valentine howls in a fake British accent over sub-AC/DC riffage. Two things save Electric Six from becoming the alt-rock Weird Al: Their jokes hit home and their music is convincingly ferocious, making Fire an unexpected triumph.