potential_victim_of_apoplexy_trigger

potential_victim_of_apoplexy_trigger = {
	OR = {
		has_trait = wrathful
		# Impatient/irritable characters tend towards this when pushed out of their comfort zone.
		AND = {
			OR = {
				has_trait = impatient
				has_trait = irritable
			}
			stress >= low_stress
		}
		# Non-calm characters may be at risk if stressed.
		AND = {
			stress_level >= 1
			NOT = { has_trait = calm }
		}
		# But everyone is vulnerable eventually.
		stress_level >= 2
	}
}

As written in game/common/scripted_triggers/20_health_triggers.txt.