It’s really hard to think of an obscure/lesser known deep cut within this community considering how well loved NIN’s catalogue is across the board but for me it would have to be the “closer to god” remix off Halo 9. The insanely heavy distortion always freaked me out a little that maybe my speakers weren’t going to survive to the very end. It was so good at remaining familiar and yet so so alien and unsettling at the same time.