I usually like the aggressive side of Fear Factory, but this is one of the most amazing songs I've ever heard in my entire life.
Fear Factory is an American metal band that formed in 1989 and has released eight full-length albums. Over the course of their career they have evolved from a succession of styles, frequenting industrial metal with flavors of death metal, groove metal, and thrash metal. - [Wikipedia](http://en.wikipedia.org/wiki/Fear_Factory)
