Example Concept: Easing curves determine how a character's movement starts and stops, affecting the perceived weight and emotion. For instance, a slow-in and fast-out curve can make a character's jump feel energetic and lively, while a fast-in and slow-out curve can convey a sense of hesitation or caution. By manipulating these curves, animators can fine-tune the timing and spacing to match the intended mood and personality of the character.