1. The Ring - I saw her face, the cut away to Katie in the closet.
2. The Conjuring - Christine sees something in the closet and wakes her sister Nancy to investigate. The audience doesn't see what it is, nor does Nancy, but what Christine sees and describes is terrifying.
3. The Exorcist - The spiderwalk down the stairs by a possessed Reagan.
4. The Shining - Danny riding his big wheel down the halls of the Overlook Hotel, turns the corner and sees The Twins.
5. The Sentinel (1977) - Alison woken up at night by something upstairs making a lot of noise, and causing her chandelier to rock back and forth, goes upstairs to investigate.
Honorable mention - Poltergeist -Robbie wakes up and sees the toy clown missing from the foot of his bed, Carrie- The ending dream sequence where Sue goes to lay down flowers at Carrie's grave, Exorcist 3 - The scene at the Nurse Station
What are some of your favorites?