Most disturbing King story?

For me it’s Apt Pupil, maybe Pet Sematary.

Edit Thank you to those who blocked out their spoilers when explaining what was so disturbing or just keeping it brief and sharing the title. We are all at different points with our Stephen King fandom here, and I appreciate giving people the opportunity to experience his work for themselves at their own pace

Second Edit I know that scene from IT disturbs you, list something else.