In this task, you're given five sentences, numbered 1 through 5, and two options a and b for possible titles for the story. Your job is to choose the title that better fits the story. Indicate your choice by 'a' or 'b'.

Sentence 1: The knife was serrated. Sentence 2: She was terrified he would use it on her. Sentence 3: She laid down on the floor at his feet. Sentence 4: He placed his feet on her head. Sentence 5: He screamed at her, but didn't kill her. Choices: a. Knife. b. Accident.
a