Here are some: 'Eyes in dark.', 'Footsteps behind me.', 'Face at window.'
Some good ones could be 'Silent phone rings', 'Shadow on wall', 'Hand under bed'. These simple yet spooky combinations of three words can quickly send a chill down your spine. They play on common fears like the unknown in the dark, the idea of being watched or something unexpected happening.
Examples include 'Whispers in attic', 'Smile in mirror', 'Door creaks open'. The 'Whispers in attic' gives the sense of something eerie lurking above in an often - overlooked and spooky place. 'Smile in mirror' is disturbing as it implies something not right with one's reflection. And 'Door creaks open' makes you wonder what is coming through the door.