From Pathfinder #181: Zombie Feast, which isn't enabled.

Slamming Gate

HAZARD 1

MECHANICAL TRAP

Stealth +7 (trained)

Description The heavy gate slams shut when opened more than halfway

Disable DC 15 Thievery (trained) to loosen the gate's springs before it slams closed

AC 16; Fort +10, Ref +2

Hardness 5, HP 20 (BT 10); Immunities critical hits, precision

Slam Shut

Trigger The door is opened more than halfway

Effect The door slams shut and deals 3d8 bludgeoning damage to any creature in the way (DC 17 basic Reflex). On a critical failure, the creature is also Restrained by the closed door until it Escapes

Reset The trap can be reactivated (or deactivated, if it's active) by flipping a lever hidden in the nearby wall. A character Searching the area finds it with a successful DC 18 Perception check.

Pathfinder #181: Zombie FeastOGL