Please don't list this on a work's page as a trope. Examples can go on the work's YMMV tab.
Nightmare Fuel: 1408
Absolutely everything that happens in room 1408.
"As you are, I was. And as I am, you will be."
When the room directory changes to show the hotel completely blacked out except for 1408.
"Five. This is five. Ignore the sirens. Even if you leave this room, you can never leave this room..."
That... fucking... phone. And the clock radio.
We've only just begun to live . . .
To say nothing of when it hijacks his video chat with his ex to get her to come up to the room so she'll die too.
For Enslin, in the story, he's so traumatized that he disconnected all the phones in his house and has to sleep with a nightlight. After an experience like that, you can't blame him.
"Even if you leave this room you can never leave this room"
One of the alternate endings on the blu-ray has Mike's editor receiving the manuscript he wrote --though God only knows how he got it-- and reading it. Quotes from the movie begin to play, looping and overlapping each other, including a few from that delightful phone (including one that didn't happen in the movie—"Your daughter is being eaten by wolves on the Connecticut turnpike") as the camera slowly backs away from the editor...through the now-inexplicably empty office. The doors swing shut accompanied by "As I am...", and the movie cuts to black just before "...you will be." -shiver-
In the original short story, the menu sequence.
Also missing from the film (and related): "My brother was killed by wolves on the Connecticut Turnpike..."
The very Adult Fear of watching your child slowly dying from a horrible illness. Full stop.
The false ending gives way to a worse piece: the evil room trots out Cusack's dead daughter, lets him hold her as she begs him not to let "them" take her away, then she crumbles to ash in his arms.
It's more psychedelic than Gothic and ghostly, but the imagery (and the protagonist's increasingly disjointed comments) will still make you sleep under the covers. Same with the descriptions of the room's "effects" on visitors. Even if you're not creeped out by the long (very long) beginning sequence where the hotel manager tries his best to convince Our Hero that he should just walk away, he room itself starts messing with reality before we'veeven seen the inside of it;
The door was crooked.
Not by a lot, but it was crooked, all right, canted just the tiniest bit to the left.
He pushed RECORD [on his minicorder] as he straightened up, saw the little red eye go on, and opened his mouth to say, "The door of room 1408 offers it own unique greeting; it appears to have been set crooked, tipped slightly to the left."
He said The door, and that's all. If you listen to the tape, you can hear the words clearly, The door and then the click of the STOP button. Because the door wasn't crooked. It was perfectly straight. Mike turned, looked at the door of 1409 across the hall, then back at the door of 1408. Both doors were the same, white with gold number-plaques and gold doorknobs. Both perfectly straight.
Mike bent, picked up his overnight case with the hand holding the minicorder, moved the key in his other hand towards the lock, then stopped again.
The door was crooked again.
This time it tilted slightly to the right.
Stephen King actually reads 1408 on an audiobook called Blood and Smoke. It's even worse hearing his weird, creepy voices than it was reading the text!
"This is nine. Nine. We have killed your friends. Every friend is now dead."