Youll notice that whenever the Blanks make themselves apparent such as when the first blank is beheaded or when they walk into the toilets in unison, the soundtrack sudden makes that noise some electronic devices make when they come into close contact with mobile phones. This isnt because someones using their mobile in the theatre, its a reference from Wright. The same noise happens whenever the Network is referenced too its an almost subconscious way of tying The Network into all modern technology, foreshadowing the eventual return to the Dark Ages that occurs when the aliens pull out.