From Pathfinder Society Scenario #6-16: The Heart of the City, which isn't enabled.

Treacherous Scree

HAZARD 3

Stealth +13 (trained)

Description The footing on this sloped ground appears to be stable at first glance, but the tiny rocks that cover it are loosely packed and prone to slipping.

Disable DC 20 Survival (trained) to navigate a safe path

Rockslide

Trigger A creature steps on the unstable ground

Effect Rocks tumble and slip beneath its feet. The triggering creature must attempt a DC 21 Reflex save as they tumble against the rocks, which deal 2d10+13 bludgeoning damage.

Critical Success The creature takes no damage.

Success The creature takes half damage and falls Prone in its space.

Failure The creature takes full damage, falls prone in its space, and tumbles down to the bottom of the slope.

Critical Failure As failure, but double damage.

Pathfinder Society Scenario #6-16: The Heart of the CityORC