Metallica's "One" is a good song. It's long, has several sections (not unlike a movement-laden symphonic piece), and features double-bass drum rhythms so fast, Lars Ulrich can't even play it anymore.
But most importantly, its got a bangin' music video.
Having said that, check out these great candid, and behind the scenes footage from the music video.
Here's the official video, released on January 22nd, 1989 from their "...And Justice For All" album.