YEAH, BOIIIIIIIIIIII SQUISH THAT JELLO, or how the effect of squishing and stretching objects in animation allow for the semblance of real life objects.

 This aspect in animation is implemented in a number of ways, such as if projecting that the character actually needs to go to the hospital:

I am merely kidding, what the principle of the stretch and squish entails is the ability to add character or show an objects weight and flexibility, such as a bouncy ball hitting the floor. As well as exaggerating gestures, making a character more relatable or a scene more dramatic.

Miraculous Ladybug employs this idea in spades.
The compression of an object or character would be the squash while the extension of the character would be, well the stretch.