Proactive Scene
1. Write one sentence (or so) detailing the goal of the main character.
2. Write one sentence showing the hero trying to achieve their goal, or avoid having someone else force their goal on them.
3. Write one sentence where the hero fails to get what they want.
Reactive Scene
4. Write one sentence detailing the physical reaction of your character to their utter disaster (above).
5. Write one sentence about the "what next" dilemma faced by your hero.
6. Write one sentence about what your character decides to do next.
So, here is is again.
Proactive Scene = Goal, Conflict, Catastrophe.
Reactive Scene = Reaction, Dilemma, Decision.
See example below.