The drone and the silence of an alien device:
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Conversations of a small crowd of aliens at
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Charging a laser gun, shot
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Spacecraft engine noise
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Closes, Spacecraft door opens
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Space, space
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Spaceship in flight, low frequency drone
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Blasters, lasers, Space wars
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Jetpack, launch, move
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Engine start, stop, Spaceship
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Spaceship flies by
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Inside a spaceship, room noise
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Closes, Spacecraft hatch opens
★★★★★