Given a premise, an initial context, an original ending, and a counterfactual context, the task is to generate a new story ending aligned with the counterfactual context and as close to the original ending as possible. Each instance consists of a five-sentence story. The premise is the first sentence of a story, and the second sentence, which is the initial context, provides more information about the story's context and the story's general plot. The original ending is the last three sentences of the story. Also, a counterfactual context is a slight modification to the initial context. You should write a new story ending that edits the original story ending as little as possible to regain coherence with the counterfactual context. To sum up, you should write the last three sentences of a story based on the premise(first sentence) and the counterfactual context(second sentence) of the story.
Example: Premise: Susie was sitting on her barstool. 
 Initial Context: She kept kicking the counter with her feet. 
 Original Ending: Suddenly, her kick sent her falling backwards. The chair hit the ground with a thud and broke. Susie hurt her head and was really scared. 
 Counterfactual Context: She kept herself steady with her feet.
Example solution: Suddenly, an earthquake sent her falling backwards. The chair hit the ground with a thud and broke. Susie hurt her head and was really scared.
Example explanation: The generated new ending is perfect. It considers the counterfactual context and changes required parts in original ending.

Problem: Premise: Klutzy Klaus hated gym class. 
 Initial Context: He was always picked last for teams. 
 Original Ending: Big Jock Ben yelled at him to get to back of the line. Klaus tripped on his own shoelaces and broke his leg. Klaus is secretly relieved he doesn't have to go to gym anymore. 
 Counterfactual Context: He was very overweight and had a hard time keeping up.

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
Solution: Big Jock Ben yelled at him to get to back of the line. Klaus tripped on his own shoelaces and broke his leg. Klaus is secretly relieved he doesn't have to go to gym anymore. 