Trent himself recognised the accidental musical similarity in an interview with David Bowie:[http://www.youtube.com/watch?v=y0RQCT69y5s&feature=player_embedded]
:Trent Reznor: There was one point when we were doing the record that I came up with this melody and I thought, "this is really good," and that I couldn't have written it myself. So I played it for [[Flood]] and he said "that's really good," and i I said "that's gotta be somebody else's song."
:David Bowie: It's from a gin advert I did in Japan!