Horror stories, urban legends, e.t.c

Knock, knock, knock

At midnight, Sara heard some knocking on her door, she thought it was her brother playing pranks on her, so she ignored it. But the knocking continued, getting louder, she was surprised no one woke up from the sound, after a few more minutes, she became frustrated, so she finally stormed up to the door and opened it, half expecting it to see her brother running towards his room, but no. Instead, it was a little girl, she gasped when there was a sudden change of her facial expression, she took out a knife and stabbed her 23 times even though she was already dead.
A boy named Ben heard someone knocking on his door. He calmly walked up to the door and opened it, seeing a small girl, she then stabbed him 24 times, she then moved to the room of another child and started knocking.