From Pathfinder Beginner Box: Secrets of the Unlit Star, which isn't enabled.

Falling Shelves

HAZARD 1

Stealth +10

Disable A hero must succeed at a DC 18 Athletics or DC 18 Thievery check to prevent the shelves from collapsing.

Topple Over

When a creature attempts to touch the shelves or take anything from them, they collapse, sending debris throughout the room. The trap makes one melee Strike against each creature in the room.

Melee Falling Debris +8, Damage 2d4 bludgeoning

Pathfinder Beginner Box: Secrets of the Unlit StarORC