Task: Story Composition
Input (English): Premise: I went on the splash mountain ride last week. 
 Initial Context: At first it was a peaceful ride. 
 Original Ending: We went into a calm tunnel. Then we dropped unexpectedly. I was scared. 
 Counterfactual Context: It was a peaceful ride from start to finish.
Output (English): Except when we went into a calm tunnel. At it's end we dropped unexpectedly. I was scared.