All the people standing on the makeshift sand wall the lifegaurds made. Take a look at where the water is right now...the tide would come in so strong at unexpected and random times that all those people on the beach would get hammered by waves and the people on the wall would have to run backwards. It was funny. You'll see how far the water comes up in a minute. And in case you can't read it, that sign says "Stay Clear". Riiiight.