Released on the 2002 album Concrete, 'Anxiety' stands as a defining track in the evolution of industrial metal. The song exemplifies Fear Factory's signature approach, blending aggressive, mechanical rhythms with melodic vocal delivery to create a sound that bridges the gap between the band's earlier thrash influences and their later electronic experimentation. As a centerpiece of the Concrete era, the recording captures the band's commitment to high-fidelity production and complex song structures, reinforcing their status as pioneers of the genre. The track remains a staple of their discography, illustrating the band's ability to maintain intensity while exploring new sonic territories in the early 2000s.