After killing the sow, Jack and his boys leave the sow's head on a sharpened stick in the jungle.
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the boars head.
Jack declares that the pig's head will be a sacrifice to the Beast, so he impales it on a stick (sharpened at both ends). The head later becomes the Lord of the Flies.
Jack leaves the beast an offering of the sow's head, mounted on a stick, and her guts. He later advises his tribe to, and I quote... "So leave the mountain alone.... and give it the head if you go hunting." After further thought he adds, "We'd better keep on the right side of him, anyhow. You can't tell what he might do."
He got shot in the back of the neck and the head.