Helicopter in flight:
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Helicopter flies
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Shuts down, Helicopter lands
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The helicopter starts and takes off
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Helicopter whirls, flies past several times
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Helicopter flies away
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Helicopter flies slowly
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Helicopter shuts down
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Flies away, Helicopter whirls in place
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Helicopter engine malfunction signal
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Helicopter approaching and landing
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Lands and flies away, A helicopter approaches
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Helicopter approaching and hovering
★★★★★