[ The surfing gets his attention right about the same time as he wipes out. It registers who it is just in time for him to disappear under the water, and Kai is starting to rush to the edge of the water where he fell in when he comes up. The water washes over his feet now, up to his calves when it's at its height, and he shifts to keep the sand from burying him, unable to stop himself from beaming. ]
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Rex...