I had heard about Cash's cover of that amazing NIN song, but I hadn't actually heard it until I saw this YouTube video about the Iraq War.
Obviously, the cover isn't anywhere near as good as the original. But, it's still decent and pretty interesting. One thing I noticed was that Cash made an incongruous change in the words, substituting "I wear this crown of thorns" for the actual lyrics, "I wear this crown of shit." The effect of the change was to give an odd and inappropriate messianic tint to the song and water down some of the pain and degradation that "Hurt" is meant to express.