through the boiling rush

I like to stand on my beach, watching a long wave start breaking in many places, and see the curling water run north and south from the several beginnings, and collide in furious white pyramids built of the opposing energies. Splendid fountains often delight the eye. A towering and deep-bellied wave, toppling, encloses in its volute a quantity of air, and a few seconds after the spill this prisoned and compressed vapour bursts up through the boiling rush in feathery, foamy jets and geyser plumes.

-- Henry Beston The Outermost House