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.
Narm: The infamous "ice skate to the face" kill when you stop and think about it.
Nightmare Fuel: What Michael does to Sarah. He repeatedly stabs her in the back, and then strings her up for the others to find. To wit, when the lights are turned on, you could see directly through her body.
Tear Jerker: There's a deleted scene where Laurie learns from one of her students about the death of Jamie Lloyd, the daughter she abandoned to go into hiding for the duration of parts 4 through 6. Laurie excuses herself from the class, goes into a bathroom and promptly vomits.