So you have to throw a rock or two, and that works, until they get bored again.

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This activity could throw up rock fragments that would land in the crater itself or on to the flanks of the volcano.

BBC: NEWS | Americas | Concern over rumbling US volcano

"If you throw a rock in this town you are going to hit an industry executive, " said Lake Bell, the writer, director and star of "In a World, " which will be shown at the festival.

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And the film's most deluxe monster is Kronos (father of Zeus, Hades and Poseidon), who, after being overthrown and imprisoned, has now risen up in the form of a really, really gigantic giant made entirely of volcanic rock and ash, with humungous arms that disintegrate and reconstitute themselves as they throw off fiery streams of lava.

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