He's pretty much just sung the song normally and cut it up by hand.
All I want is for everyone to go to hell...
...It's the last place I was seen before I lost myself

Quote by DisarmGoliath
You can be the deputy llamma of the recordings forum!
It is just multiple takes cut up by hand and put together as chemicalfire said. Most likely sung with slightly different timbre as some of the words purposely come back in on bad cuts (especially seen at beginning of second verse).

I think its awesome (I am a huge Reznor fanboy).
Glitch is gonna sounds close but it honestly sounds like hes honestly singing it about 4 different times and glitching/editing in different lines. Interesting stuff
Derpy Derp Derp Herp Derp