I couldn't tell you when I first heard this song. I know it is indispensable for me now.
The song starts off very guitar-heavy, and somewhat light musically. Lyrically, it's about shooting someone, so not so light. But then, about 50 seconds in, the song, while remaining guitar-heavy, adds a heavy drum and bass piece. And the tempo and feel of the song changes strongly, and not to the lighter. It's a well constructed song, and I like how it so seamlessly changes like that after such a long time. There's a third change, which goes more to the jangle-pop sound that is so core to the band.