 yell for help, and maybe someone can get to you with flotation. Flotation saves lives. So it sounds like that's the very first step you should take before swimming in a body of water with which you're not familiar, is to look for that kind of uneven water coming up onto the beach. What else do you look for or should you consider before swimming? Obviously, you look for lifeguards, and many of them have flags. I know here where I am, they post flags for the sort of safe area for swimming. Is that a frequent thing?