Doorbell, spacecraft signal:
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Closes, Spacecraft door opens
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Shutdown, Jetpack, approach
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Space, swoosh, fast moving
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Distress, Electronic communication signals
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Alert signal on a spaceship, drone
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Inside a spaceship, room noise
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Space alien radio signal
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Laser gun shot, Spaceship flies by
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Technical compartment, Inside the spacecraft
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Space station generator
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Doorbell, spacecraft signal
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The drone and the silence of an alien device
★★★★★