* "Closer" uses a heavily modified sample of a kick drum from the song "[[Nightclubbing]]" from ''The Idiot'' album by Iggy Pop. [http://www.9inchnails.com/articles/articles.php?id=6]
* "A Warm Place" is based on the melody from David Bowie's 1980 single "Crystal Japan." Some hear it as a complete rip-off, while others argue that from a music theory point of view that the structure has significant differences.
*The looping female voice that appears on "Reptile" (approx. 5:06) is from the 1974 film ''The Texas Chain Saw Massacre''. The strange mechanical sound before the drums start can be found in the movie ''Leviathan'' and the other sounds during all the song are found in ''Aliens'' (the escape in the vessel). Also, while not a direct sample, the ascending synth melody from 5:13 to 5:20 seems to be a reference to "Laura Palmer's Theme" from the television show ''Twin Peaks''.
==Re-Releases==