This happens during the day. A lady gets stuck in her bathroom because she accidentally dropped the key down the vent. This all happens in her house in about a span of three hours.
Mrs. Smith was just doing her business in the bathroom and then when she went to open the door she realize she didn't have her key. She looks in the mirror and sees something scary. She starts freaking out.
I better get a knife in case he tries to hurt me, I'm still scared from that thing in the mirror.
A man shows up at the door.
Hello Mrs. Smith. You need to take you medications you're late.
Mrs. Smith can't get to the door and is still looking for her key.
Mrs. Smith finds a bobby pin to unlock her door. She is afraid the person at the door might hurt her. She grabs a knife and goes to the door.
Mrs. Smith has a illness that makes her see things. There was nothing in the mirror.