Crashing in the fall:
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Chemistry, stir the liquid in a beaker
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Lab accident
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The noise of the room, electrical appliance
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The receptionist trolley passes by
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Laboratory experiment
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Bagging in the bag
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Sine wave (975Hz)
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Jurassic, sounds of the, dinosaurs
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Burner, boiling liquid, Chemistry
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Turn on, blink, Daylight lamp
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Air bubble film, popping bubbles
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Pogroms in a fight
★★★★★