Pretty much anything where values change over time depending on the speed of a bodypart or atom. You could have a light attached to a rocket and have it flare brighter if the rocket moves faster. You could have an expression driven by how fast her hand moves. So far, the only thing I've done with it is have a light change colors in a dance scene, using her chest motion. The light then seems to pulse along with her dance.
Does exactly what it says on the tin! Plus some really nice conveniences and utility features that make this plugin incredibly versatile. Thank you so much Dragontales!