Superhero thunder god Thor is back for the second movie in the franchise. In 'Thor: The Dark World' he's teaming up with his trickster brother Loki to fight the greater evil of the Dark Elves. To launch the film, Thor's hammer came crashing down in London for one of the biggest launches held there. Taking up nearly half of Leicester Square, it should have been nerve-wrecking for the stars - but not for Hemsworth who found it all quite comforting.
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