It turned its head.
Sam laughed nervously. It was clearly a creepypasta. Some bored person trying to scare night drivers. He taped a trash bag over the shattered window, got back on the highway, and decided to ignore all three rules.
The next morning, a state trooper found a single phone lying on the shoulder of the bridge. The screen was still lit, still open to the search result: can i drive with a broken rear window
His brain screamed at him: Rule 3. Three taps. Pull over. Get out. Don't look back.
Tap.
The door locked. The engine revved. And the car drove off into the night without him.
Sam slammed the brakes, swerved onto the narrow emergency shoulder, and threw open the driver's side door. He stumbled out into the rain, gasping, and walked ten paces forward before he remembered the last instruction: Do not look back. It turned its head
He looked back.