Toxic �� on Instagram: "interesting fact about the animation of the Pixar film Up (2009). Carl's Character Animation Aging Body: Pixar's team built a full biomechanical model to accurately animate Carl's aging body, simulating how his joints, spine, and center of gravity would shift with age. Movement: His walk cycle was engineered with reduced stride length, lowered shoulders, and a forward-leaning posture. Emotional Change: When Carl becomes emotionally energized, his movements subtly loosen a