The Itch

The itching under my cast became unbearable, so I cut it off myself.

Something inside my arm had already cut a hole to get out.

WHY THIS ONE WORKS

The turn works by making the body itself unreliable, leaving no safe distance between the reader and the threat.

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.