Djent is a relatively new subgenre of metal music. There is not much rhyme or reason to how it works besides a core rhythm. Most djent artists are not concerned with music theory, but making their songs a rhythmic orchestration of sorts. Following a recent trend among newer metal bands, most djent songs do not feature solos. Instead they have breakaway parts of the song which feature a signature catchy riff. Periphery helped popularize the djent movement following in the footsteps of the very popular Meshuggah. This particular number is Buttersnips from Periphery’s selt titled album.
http://www.youtube.com/watch?v=DCRD_hEeydc