First I'm equipping Flame Shield and taking Anti Flame Potion.
The Judas Kiss off of Metallica's new album Death Magnetic is easily the best song on the album but I'd go as far as saying that it's one of Metallica's best songs they have ever recorded/created!
The riff's, the drums, the bass, the lyrics...are just awesome. They take the catchiness out of Metallica's more mainstream stuff and mix it in with their old school thrash! And it just creates an ultimate song of ultimateness!