A helicopter approaches, lands and flies away:
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Helicopter whirls in place, flies away
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Helicopter shuts down
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The helicopter starts and flies away
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Helicopter flies (fast)
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Helicopter flies away
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Helicopter Warning System
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Helicopter takes off
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Shuts down, Helicopter lands
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Flies past several times, Helicopter whirls
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Helicopter expects jammed
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Lands and flies away, A helicopter approaches
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Helicopter approaching and landing
★★★★★