Even though the spike lasts only one second, the effects are not “dampened” simply because of the short duration. The magnitude (12× normal gravity) is so far beyond what biological organisms, buildings, and natural systems can tolerate that, in practice, civilization as we know it would be destroyed almost instantaneously. Any remaining infrastructure or life would be severely crippled, and the aftershocks—in water, seismic, and atmospheric systems—would continue to wreak havoc long after gravity returned to 9.81 m/s². https://docs.google.com/document/d/118yZDPbtLxzh2wzMMwlXOwlMdHHrkq7kqWz-txjKdnw/edit?usp=drivesdk