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Slamming GateHazard 1

Legacy Content

Mechanical Trap 
Source Pathfinder #181: Zombie Feast pg. 17
Complexity Simple
Stealth DC 17 (trained)
Description The heavy gate slams shut when opened more than halfway.
Disable Thievery DC 15 (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, object immunities, precision damage
Slam Shut [reaction] 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 save). On a critical failure, the creature is also restrained by the closed door until it Escapes (DC 17)
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.