5. 'Head Like a Hole'
For many, "Head Like a Hole" was the first proper introduction to Reznor and Nine Inch Nails. Written in 1988, it remains a staple of the band's repertoire over two decades later. One of the last songs to be written for the band's platinum-selling debut Pretty Hate Machine, the track combines elements of industrial rock as well as thrash metal.
In the months following its release, Reznor found himself having to justify his music's dark themes. "It's not like I'm a horribly depressed person," he told Rolling Stone, "but the music I always liked as a kid was stuff I could bum out to and realize, 'Hey, someone else feels that way, too.'"