Have you ever watched two dogs fighting with one another who separate, shake it off, and then go about their day as if nothing happened? Or how about one of those National Geographic videos of a herd of wildebeests escaping an attack, slowing down, and resuming their search for grass to eat?

Doesn't it seem like they get over that cheetah attack a little too quickly? That's because animals - humans included - have instinctual methods of discharging stress and trauma almost immediately after it happens. They literally shake it off.

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