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Jack pointed suddenly.
“His specs – use them as burning glasses!”
Piggy was surrounded before he could back away. (2.159-161)
Piggy’s glasses become the boys’ one technological advancement. We wonder why Jack is the boy that thinks of using them.
"…fear can't hurt you any more than a dream. There aren't any beasts to be afraid of on this island . . . Serve you right if something did get you, you useless lot of cry-babies!" (5.79)
Jack isn't winning any Mr. Sensitive awards here. He's also wrong: fear can hurt you; and there are beasts on the island.