Despite Mr. Marjanovic's assertion, the Laws of Physics still function without his esteemed permission. The water receded, before the wave hit the beach.
I've read/heard some accounts of where people were stuck out on boats when
the water started behaving strangely becoming all swirlly and what not,
which I am told is indicative of the water receding. Another report
supposedly has a young girl, who has just recently learned of Tsunamis at
school, warning her mother about the receding water and thus being able to
evacuate the resort in time.