In Lord of the Flies, Jack and his hunters cruelly kill a sow, a pig, and then cut the head off and hang it on a stick. The flies swarm around the head. Jack and his boys sacrifice the head to what they call the beast. The head becomes the Lord of the Flies.
In an interpretation of the pig's head on a stick, it becomes representative of the beast that is inside Jack and his savage hunters. Jack becomes a cruel savage. He slits the pig's neck and slings blood on the boys who laugh hysterically:
Jack begins to rub the blood on his hands onto Maurice, and then they notice Roger withdraw his spear. They become hysterical because he had pinned the sow by driving the spear through its anus. They reenact the slaughter until they grow tired.
Simon sees the pig's head on the stick. He is given a message by the pig. It is as if the head is talking to Simon:
The message that is given to Simon by the Lord of the Flies exemplifies this. The Beast (evil) is in each one. Previously Simon had stated the same thing, though he was roundly ignored.
When Simon runs to share what he has seen as the beast, the dead parachutist hanging in a tree, he encounters a deadly hunting-dance frenzy. The boys are dancing and reenacting the killing of the pig. Caught up in a hunting frenzy, when Simon comes out of the forest, the boys assume he is the beast and they begin to tear and bite at him until they kill him.
Truly, the beast is within the boys. Jack is a representation of the Lord of the Flies. He is in authority over his choir members. He has no trouble pulling out "steaming colored guts" from the pig they kill unmercifully. Jack himself has become savage. He is a good representation of the Lord of the Flies as the pig's guts and blood become a part of him. No doubt, the flies swarm Jack in a symbolic form.