Hermione sighed her relief when the Muggles exited the room moments later without discovering her hiding place. If they were on their way to call the police, she had a small window of time she could get out. She pressed her ear against the door to the corridor to listen for any nearby sounds. When she was convinced that the security guards were gone, she carefully turned the doorknob. No one met her in the empty corridor. No one met her in the stairwell. She had all but convinced herself that she was about to make it out of there.