From Pathfinder Society Quest #10: The Broken Scales, which isn't enabled.

Trapmaster Tok's Surprise (1-2)

HAZARD 1

Stealth +7 (trained)

Description Pressure sensitive panels in the floor connect to a barrel of debris hidden in the hallway's ceiling

Disable DC 20 Thievery (trained) on the floor panels before the barrel falls

AC 16; Fort +10, Ref +2

Hardness 5, HP 10 (BT 5); Immunities critical hits, precision

Falling Debris

Trigger Pressure is placed on any floor tile

Effect The barrel of debris tips over and showers broken glass down. The glass deals 2d8 slashing damage and 1 bleed damage (DC 20 basic Reflex save) to all creatures within 10 feet.

Pathfinder Society Quest #10: The Broken ScalesOGL