Task: Story Composition
Input (English): Premise: John buckled his seat on the biggest roller coaster at the park. 
 Initial Context: John felt the huge roller coaster stop abruptly. 
 Original Ending: From the top of the hill, John could see the entire amusement park. He was stuck at the top for three hours. John never went on a roller coaster again. 
 Counterfactual Context: John felt the huge roller coaster moving quickly but smoothly.
Output (English): From the top of the hill, John could see the entire amusement park. The whole thing felt like it lasted for three hours. John never went on a roller coaster again.