I held my breath when I heard slow breathing beneath the bed.
The breathing stopped too.
Sleep removes the reader’s ability to verify what happened, which lets one physical detail carry the entire turn.
It follows the house rule: exactly two sentences, with the turn doing more than adding a monster. It changes the reader’s interpretation of the setup.
Closet
I woke up to find my closet door open, although I always lock it before sleeping.
The Ceiling
Every night I hear my upstairs neighbor drag furniture across the floor at 2 a.m.
One Percent
My phone had been dead for hours when the flashlight suddenly turned on beneath my blanket.
Motion Alert
The motion alert showed a woman standing motionless in my backyard at 2:11 a.m.
Face ID
My phone unlocked with Face ID while I was asleep alone in the apartment.