This section of the novel comes just after Guy Montag has turned the flamethrower on Beatty and his other firemen, burning them into steaming husks. The narrator comments that it was like "The blowing of a single autumn leaf." It is then that Montag turns and the Mechanical Hound suddenly appeared. The Hound and Montag fight, during which the Hound stabs the needle into Montag's leg before Montag "kills" the hound with his flamethrower:
He felt it scrabble and seize his leg and stab the needle in for a moment before the fire snapped the Hound up in the air, burst its metal bones at the joints, and blew out its interior in a single flushing of red colour like a skyrocket fastened to the street.
Although he has slain the Mechanical Hound, Montag is still slowed down by the injection, for it has anaesthetised his leg making it difficult for him to walk. Montag is forced to "hobble" from the scene, running away as quickly as he can.