The extract creates tension and suspense through the use of repetition, descriptive diction, and foreboding imagery. Montag's desperate escape from the city is conveyed through repeated exclamation points, a countdown, and words describing his physical torment. Descriptions of the sleeping citizens by their doors heightens anxiety as Montag nears discovery. Imagery of the citizens as "gray animals peering from electric caves" creates a sense of foreboding about what may happen in the cold, soulless night.