Squash and Stretch

Squash and Stretch is a fundamental principle in animation and motion design that refers to the deformation of objects as they move to express their flexibility or fluidity. It's used to add a sense of weight, volume, and momentum to animated objects, making the motion appear more natural and dynamic. When an object is in motion or impacts with another object, it squashes (flattens) on impact and stretches (elongates) when moving quickly or rebounding.