Reaction vs. Lightness

Think of the difference between 'light' and 'reactive'. Brego used to be reactive, now he is light. Aha! Reactive doesn't necessarily mean explosive. A horse can have the right reaction, but it is still a reaction none the less.

You don't want a reaction, you want a light response.

Lightness: A calm and smart response to pressure.

Reaction: A horse moving out using it's prey animal instincts.