there are two bonus songs, which follow 91 silent, one-second tracks (numbered 7 through 97) on most cd copies, but were included as a separate 3" cd or 7" record with early pressings. "physical" is a cover of the adam and the ants song "physical (you're so)", originally released on the "kings of the wild frontier" lp." in 1995, nine inch nails performed "physical" live with adam ant for two nights in a row. after reznor introduced ant and marco pirroni on the second night, ant proclaimed to the audience, "it's nice to be on stage with the best fucking band in the world." "suck" was written by pigface, whose ever-changing lineup once included reznor. the slower, sparser, radically different original version appeared a year earlier on pigface's "gub" album.