An experimental streak as restless as it is bold courses through the layers of NIN's output. On “Suck”, Trent Reznor cuts his trademark industrial crunch with contorted funk grooves. Piano-laced “All the Love In the World” is cyborg gospel featuring some of his most introspective lyrics. But the most radical example has to be “34 Ghosts IV”, acoustic-rich dark ambient from the haunted Ghosts I-IV album.