The Handmaid's Tale by Margaret Atwood:
Moira was out there somewhere. She was at large, or dead. What would she do? The thought of what she would do expanded till it filled the room. At any moment there might be a shattering explosion, the glass of the windows would fall inward, the doors swimg open. . . . Moira had power now, she’d been set loose, she’d set herself loose. She was now a loose woman.
I think we found this frightening.