Motörhead's overwhelmingly loud and fast style of heavy metal was one of the most groundbreaking sounds the genre had to offer in the late '70s. Though the group's leader, Lemmy Kilmister, had his roots in the hard-rocking space rock band Hawkwind, Motörhead didn't bother with his old group's progressive tendencies, choosing to amplify the heavy biker-rock elements of Hawkwind with the speed of punk rock. Motörhead wasn't punk rock (they formed before the Sex Pistols and they loved the hell-for-leather imagery of bikers too much to conform with the safety-pinned, ripped T-shir...