Something I've noticed about my cats, and I'm sure it's true for cats in general: When they're running around the house playing, they hold their bodies at normal height. But on the rare occasions when they're running away out of fear, they get low to the ground. I'm not even sure how they run like that. Anyone know the reason for this? Is this so they can hide more easily? Is this to try to dodge an incoming predator? Is this so the predator can't see them as well?