Given the task definition and input, reply with output. In this task, you're given a four sentences of story written in natural language. Your job is to complete end part of the story by predicting appropriate last sentence which is coherent with the given sentences.

Sentence1: The sea was frightening during a storm. Sentence2: Marcus hated the way the boat rose up and crashed down. Sentence3: It made him sick to his stomach. Sentence4: He cowered in his cabin and shut his eyes but it didn't help.
Marcus then vomited from sea sickness.