"Heroin" begins with a guitar figure that feels almost too simple to bear the weight it will eventually carry. At 0:00, the sound is dry, lightly struck, and close to the floor. The pulse catches quickly, but there is very little cushion around it. The recording gives the listener a rail before it gives them release.

Through the first minute, the voice sits plainly inside that rail. The arrangement is spare enough that small changes in vocal force feel exposed. Around the edge of the strum, a high scraped brightness starts to matter. It does not decorate the track. It irritates it, keeping the surface from settling into folk-rock ease.

By 1:45, the music has more charge stored in it even when the figure appears to return. The guitar is still stubbornly basic, but the space around it has tightened. The rhythm feels less like support and more like something the performance has climbed onto. The sound is still intimate, but it is no longer calm.

Around 2:29, the track loosens without opening. The pulse can briefly feel usable, almost rideable, then the accents begin to shift and the surrounding noise pulls the listener back toward instability. The same repeated materials are doing more work now: guitar as spine, drum motion as propulsion, high scrape as exposed nerve.

Near 2:51, the central drive takes command. The tempo seems to press forward in waves. The band keeps returning to a narrow frame, but the skin of the recording keeps deforming around it. Parts are harder to separate cleanly; brightness, strum, beat, and vocal presence begin to smear into one increasing rush.

The middle stretch raises heat without becoming ornate. The power comes from endurance. The guitar figure remains legible, but the performance around it grows ragged and bright-edged. When the rhythm surges, it does not feel like a formal climax placed on top of the song. It feels like the song's repeated motion has started generating more force than the frame can safely contain.

After 5:45, the sound becomes punitive in its simplicity. The beat is less a backbeat than a repeated shove. The high noise cuts harder against the strum, and the vocal rides the surge without giving the performance a clean release valve. Attention has nowhere else to go because the song has made its narrowness absolute.

In the final drive before 7:00, the recording sounds close to burning through itself. It is fast, exposed, scraped raw, and still held to the same basic motion. At about 6:59, the force releases in pieces. By 7:09, the pattern has emptied enough that silence feels like the last sound the arrangement was moving toward all along.