Lab accident:
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Closing doors,, opening, Freight elevator
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Metal rattle, crashing,, Trash falling
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Servo motor
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Metronome
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Pull telescopic antenna
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The subject falls on the wooden floor.
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Chemistry, ground powder on the table
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Removing the napkins from the box
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Bicycle rear wheel ratchet
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Time Machine
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Subject falls on gravel
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Air dissection
★★★★★