The process by which air rushes out of the cliff with an explosive effect as pressure is released, when a storm wave striking a rocky cliff retreats, dislodging rock fragments or even huge boulders. Hydraulic action Abrasion Attrition Corrosion

The process you are describing is known as "Hydraulic action." This occurs when waves crash against a rocky cliff, trapping air in cracks and crevices. As the wave retreats, the pressure is released explosively, which can dislodge rock fragments or even large boulders.