Given the task definition and input, reply with output. In this task, you're given the title of a five-sentence story and the first four sentences. Your job is to write the last sentence of the story such that it seamlessly connects with the rest of the story.

Title: The Boat Crash. Sentence 1: Tammy was riding on a boat with her friends. Sentence 2: They had been drinking a bit but were driving slowly to be safe. Sentence 3: Suddenly, her friends got rowdy and decided to start speeding. Sentence 4: Tammy was scared and warned them to stop.
Unfortunately they didn't and their boat crashed into a rock.