Paranoid Android

Jonny Greenwood's music, though it goes unmentioned in Roy's review, is a key element of There Will Be Blood.

The movie opens with a shot of dry, bare Western hills. Then we see a man prospecting for silver at the bottom of a shaft. He blasts the hole deeper with dynamite, falls and breaks his leg, and, with a titanic struggle, draws himself back up. Finally, we see him lying on the floor of an assay office, his leg in a splint, signing for the earnings that will enable him to drill for oil. The sequence is almost entirely wordless, but it is framed by music, much of it dense and dissonant. At the very beginning, you hear a chord of twelve notes played by a smoldering mass of string instruments. After seven measures, the strings begin sliding along various trajectories toward the note F-sharp. This music comes from a Greenwood piece called “Popcorn Superhet Receiver,” and, although it wasn’t composed for the film, it supplies a precise metaphor for the central character. The coalescence of a wide range of notes into a monomaniacal unison may tell us most of what we need to know about the crushed soul of the future tycoon Daniel Plainview.

In fact it's the best soundtrack since another great guitarist was asked to limn the West in music.