Task: Story Composition
Input (English): Premise: My brother and I were having a water balloon war. 
 Initial Context: He was bombing me by dropping them over the second floor banister. 
 Original Ending: I laid in wait for him behind a corner with a huge water balloon. I heard footsteps approaching. It was too late when I threw the balloon and realized it was my dad! 
 Counterfactual Context: I was bombing him from up high in a tree.
Output (English): I laid in wait to see his reaction. I heard footsteps approaching. It was too late when I threw the balloon and realized it was my dad!