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.
Q: Premise: Kim was going tubing. 
 Initial Context: Her uncle was driving the boat. 
 Original Ending: The tube went side to side. A few times, it went in the air. She held on tight but eventually fell off. 
 Counterfactual Context: She was floating gently down a quiet river.
A: 
The tube went side to side as the speed of the river picked up. A few times, it went in the air. She held on tight but eventually fell off. 