These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
YMMV: When a Stranger Calls
Complete Monster: The Stranger is a Serial Killer who stalks, terrifies and eventually murders young women just for the joy of it. He prefers to target babysitters, having no compunction about killing the children they’re watching over either. He kills a random babysitter and two kids on the other side of town, then preys on Jill for the rest of the film, killing her best friend Tiffany in the proces. He's eventually stopped and arrested, but the trauma from the experience is so great that Jill suffers a psychotic break, dreaming that the Stranger is still there to torment her.