From Pathfinder #158: Sixty Feet Under, which isn't enabled.

Rigged Cubby

HAZARD 6

Stealth +15 (expert)

Description A hidden string connected to precariously stacked bricks causes the cubby to collapse in on itself when the string is pulled.

Disable DC 20 Thievery to cut the string without setting off the trap

AC 25

HP 1 (BT 0); Immunities precision, critical hits

Collapse

Trigger A creature touches the sickle in the cubby

Effect The heavy bricks above the cubby collapse, leaving the sickle unscathed but dealing 4d6+10 bludgeoning damage (DC 26 basic Reflex save) to the triggering creature.

Pathfinder #158: Sixty Feet UnderOGL