Follow Through & Overlapping Action Mastery

The Momentum Principle

Nothing stops all at once. When a character halts, their hair keeps moving. When a car brakes, passengers lurch forward. Follow through and overlapping action capture how different parts of a system respond to forces at different rates—the principle that makes animation feel physically grounded.

Core Theory: Two Related Concepts

Follow Through: When the main body stops, appendages continue moving due to momentum, then settle. The termination behavior of motion.

Overlapping Action: Different parts move at different rates throughout motion, not just at stops. Hair doesn't start moving when the head starts—it drags behind, then catches up. The continuous offset of timing.

The Drag Hierarchy

Parts further from the root of motion drag more:

1. Root (hips, torso): Moves first, stops first
2. Primary extensions (limbs, head): Slight delay
3. Secondary extensions (hands, facial features): More delay
4. Tertiary elements (fingers, hair, cloth): Maximum drag