Changes

===Down In It (Demo)===

Appears on ''Head Like a Hole'' (US) as the last track, it's extremely similar to the ''Purest Feeling'' version, except that it lacks the long intro and all the extra layering of it's ''Purest Feeling'' counterpart as well as the distorted outro. Most likely it's the definitive "original version" of Reznor's very first song as Nine Inch Nails.

====(Demo II)====

===Down In It (Skin)===

The mix from the ''Down In It'' single and later chosen to be the mix that appeared on ''Pretty Hate Machine.''

===Down In It (Shred)===

A mix that appears on both the ''Down In It'' and ''Head Like a Hole'' singles. It's basically retains the original song with an extended intro and a long instrumental area that makes up the entire latter half of the song, considered the "extended single version" of the song by some.

===Down In It (Singe)===

A mix that appears on both the ''Down In It'' and ''Head Like a Hole'' singles. It's a mostly instrumental "dub" mix of the song with minimal vocals and strange warping and mixing of the beats with heavy bass emphasis. It should be noted that this mix is actually 18 seconds longer on the ''Head Like A Hole'' (US) single than it was on the ''Down In It'' single. The reason for this is unknown, though it's probably due to the time constraints imposed on Vinyl singles compared to a full sized LP Maxi Single.

==Live==