From Pathfinder Adventures: Troubles in Grayce, which isn't enabled.

Rolling Death

HAZARD 4

Stealth +12 (trained)

Description A trip wire hidden in the dust of the midway point of the floor releases a large boulder to roll from the northwestern corridor toward A4, crushing anything it meets.

Disable DC 22 Thievery (trained) to set the trip wire to a different anchor point without changing the tension

Tumbling Boulder

Trigger The trip wire is pulled or severed

Effect The boulder careens from its holding area to crush anything in its path. Anyone in area A3 path takes 2d12+4 bludgeoning damage (DC 25 basic Reflex save).

Pathfinder Adventures: Troubles in GrayceORC