"A circling movement developed and a chant. While Roger mimed the terror of the pig, the littluns ran and jumped on the outside of the circle. Piggy and Ralph, under the threat of the sky, found themselves eager to take a place in this demented but partly secure society. They were glad to touch the brown backs of the fence that hemmed in the terror and made it governable."
Which word or phrase from the passage above best reveals the boys' motivation for joining in this chant as the storm hits?