Robb Flynn über die Bedeutung des Songs: "'Locust' is a metaphor. Locusts fly in a swarm, but they can't control which direction they fly; they float on the wind, they land, cause massive destruction, and then float away on the wind to leave you in the aftermath. The song is a metaphor for a type of person that sometimes comes into your life and has a similar effect."
Musikalisch gesehen ist der Song der Kern dessen, was Machine Head innerhalb der letzten knapp zwei Jahrzente geschaffen haben. "It feels like the culmination of what we've been doing for the last 17 years: Power grooves, patented Machine Head harmonics, crushing guitars and dark melodies, but taken to a new level," meint Flynn. "It's a natural progression from The Blackening, but different than anything on that record. In the past, when we debuted a new song, it was usually the fastest, thrashiest tune. This time we wanted to go with something just straight-up heavy."
Der Song hat eine Spieldauer von knapp 8 Minuten, was nicht ungewöhnlich für die Band ist. Flynn witzelt: "We still can't seem to write a damn song under six minutes. But Machine Head aren't writing music for the radio or MTV. This is for us. This is for the metalhead who let's music take him on a journey. This for the metalhead for whom music is the only thing that matters, to whom music is a savior. The music fan who's going to study every detail of the artwork, go online and find the lyrics and memorize every word, and let it take them away from their fucked up life for a while. It's for the music freak, who maybe just wants to get hammered, air-guitar and sing at the top of his lungs, and act like an friggin' idiot while starting a moshpit in their living room with reckless abandon. Because that's who wrote this song, and that is the only people we care about connecting with."
