From Pathfinder #195: Heavy is the Crown, which isn't enabled.

Cave-In

HAZARD 8

Stealth +14 (trained)

Description The rubble shifts and the cavern ceiling collapses.

Disable DC 28 Crafting (expert) or DC 31 Survival (trained) to prop up the cavern ceiling without triggering a collapse.

Collapse

Trigger A creature moves the rubble

Effect The cavern collapses in a cave-in that deals 4d8+22 bludgeoning damage to the triggering creature and all creatures in the cavern (DC 30 basic Reflex save).

Pathfinder #195: Heavy is the CrownOGL