In the guitar.com video, he refers to the section after that really scary breakdown (the one that repeats, and then really high guitars come in over the top of it for another two times, and then the vocals come in over a really lameo riff that repeats like 9742 times) as the "russian riff." I dunno how to explain it really unless you know music theory, in which case it's the riff that has 3 bars of 5/8 and one of 6/8.
Edit: Duh, it starts at 6:10