The tunnak is not only seen on festive occasions. In fact, they are also commonly performed when a person is sick, especially if relatives perceive the illness as incurable by modern medicine. This follows after a traditional healer, or mangilu, identifies spirits as the cause of the malady.
Ibanag priest and scholar, Fr. Marino Gatan, explained in his research that the Ibanag people view the earth as a communal habitation for people and spirits or elemental deities. Thus, the Ibanag are wary of their environment, particularly those places that are barely disturbed by human activity, such as woodlands and the wilderness in general. This is to avoid offending diverse types of unseen elementals, who, according to belief, possess varying dispositions and ways of inflicting vengeful harm to individuals.
This collection of creatures of folklore can be classified into the elementals or kutu na davvun (literally “lice of the earth”) which are connected to nature, immaterial ghosts or amang (Cagayan Ibanag) or banig (Isabela Ibanag), and various bestial monstrosities and legendary figures that Ibanag parents utter when disciplining their misbehaving children.