It was as if someone had poured tons of coffee and milk into the ocean, then switched on a giant blender.
Suddenly the shoreline north of Sydney were transformed into the Cappuccino Coast.
Foam swallowed an entire beach and half the nearby buildings, including the local lifeguards' centre, in a freak display of nature at Yamba in New South Wales.
One minute a group of teenage surfers were waiting to catch a wave, the next they were swallowed up in a giant bubble bath. The foam was so light that they could puff it out of their hands and watch it float away.
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