They didn't know that she had seen them. They didn't know what she had planned. They were just walking along the boardwalk for the first - and last - time.
She knew perfectly well who they were. She was perfectly prepared for what she would do. She had walked down this boardwalk before, and would do it again.
They thought everything would end up okay.
She was sure that it wouldn't.
They got to the end of the boardwalk and turned around.
She lunged with her weapon.
They screamed and collapsed to the ground.
She grinned and licked the blood off her knife.
They were dead.
She was very much alive.