pf2e.fyi
From Pathfinder Society Scenario #6-03: Godsrain in a Godless Land, which isn't enabled.

Sudden Drop

HAZARD 3
Stealth +12 (trained)
Description A portion of Manaket's sewer system is under construction and has been left covered by only a few planks of wood since the Godsrain. After two weeks of wear, they're ready to collapse.

Disable If all the PCs succeed on a Perception check against the Stealth DC to spot the hazard, they're able to detour around the weakened boards without triggering it. There's not enough time for PCs who succeed on this check to warn PCs who fail.


Break Through
Trigger One or more PCs fail to spot the hazard and step onto the weakened boards

Effect The boards give way, dropping the PCs 5 feet into the open septic tank. The PCs can attempt to Grab an Edge; those who fail and fall into the tank become Sickened 1 and cannot reduce this condition until after the Ambush! in Kassi's lab.

Triggering this hazard also accrues 1 AP for the party.

Pathfinder Society Scenario #6-03: Godsrain in a Godless LandORC