Jack struggles with his fear of blood, but also his fear of appearing weak to the other boys. In the first chapter of the novel, Jack catches a small piglet but hesitates instead of killing it. The piglet escapes, and Jack feels embarrassed by his obvious fear, "the enormity of the knife descending and cutting into living flesh; because of the unbearable blood" (31). In the aftermath of the scene, Jack swears to the other boys, Ralph and Simon, that next time he will kill a pig.
Killing a pig becomes a fixation for Jack; he feels as though he must kill a pig to vindicate himself in the eyes of the other boys and to prove that he is a true master hunter, unafraid of blood or anything else for that matter. In the original moment with the piglet, Jack felt powerless, and in order to reestablish himself as a worthy leader, someone with power, he must overcome his fear of blood with a successful kill.