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Health, 07.04.2020 19:42 nolangriffin

Carla was startled by an extremely loud bang that sounded like a gunshot. Her heartbeat accelerated rapidly. When she found that the noise was only a car backfiring, she felt greatly relieved but her heart kept beating heavily for over half an hour. Why did this happen?

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Carla was startled by an extremely loud bang that sounded like a gunshot. Her heartbeat accelerated...
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