properly secured. jeff rossen has more on what happened and whether you should be concerned about your own child's safety. >> reporter: watch that waterspout in the ocean. >> underwater tornado! >> reporter: beachgoers in ft. lauderdale enjoying the sighting. but then it comes ashore whipping up sand that, blue tent then this. >> bounce house. there's kids in there. >> reporter: three young kids inside hanging on for dear life as their bounce house goes airborne. cell phone video capturing it all, posted on facebook. >> oh my god! >> reporter: police say the children were above the trees before they were tossed out. >> falling out like tonka toys, they didn't even look real. >> reporter: they handed on sand, injured but alive. >> the bounce house flew then i fell in the dirt. >> reporter: there have been