“Driftin’ Back,” the first song off Neil Young’s 33rd studio album, clocks in at a sprawling 27 minutes, slowly growing from a light folk strum into a drifting behemoth of sound. It gives you an idea of what Psychedelic Pill is all about, with Young and Crazy Horse letting loose on some of the most jam-friendly material they’ve ever made. The whole thing culminates in “Walk Like a Giant,” a fiery garage rocker that slowly dissolves into four minutes of crushing, amplifier-destroying feedback.