pf2e.fyi
From Pathfinder Adventure: Crown of the Kobold King, which isn't enabled.

Loose Slab

HAZARD 3
UNCOMMONMECHANICALTRAP
Stealth +13 (trained)
Description The stone slab tears free from its track with the ear-piercing sound of failing metal.
Disable DC 20 Crafting (expert) to shore up the track so that it functions as intended, or DC 18 Thievery (trained) to wedge the slab in place to immobilize it
Falling Slab
Trigger A creature attempts to move the slab
Effect The slab rips free from its track and falls, slamming down in one direction while it kicks up twisted metal debris in the other. All creatures adjacent to the slab take 3d6 bludgeoning plus 3d6 piercing damage (DC 20 basic Reflex).
Pathfinder Adventure: Crown of the Kobold KingOGL