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SAN FRANCISCO — Howard Kuljian and his family were out for a walk on a damp, overcast morning at Big Lagoon beach, playing fetch with their dog Fran as 10-foot surf churned the water just feet away like a washing machine.
Signs near the beach warned of “sneaker waves,” the kind that suddenly roar ashore.
Kuljian tossed a stick that took the dog down to the water’s edge, and in an instant, authorities said, a wave swallowed it, setting off a nightmarish scramble.
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