“Don’t go out too far, sweetie!” I’d shoot Mom a thumbs-up, but my hands are too busy keeping me afloat. My feet stopped touching the sand ages ago, and I need both arms and legs to stay above the waves. I swim farther out to sea. “That’s far enough!” I glance back at shore. Mom beckons me back to her. I paddle back at an angle, prolonging my swim. Halfway there, a rip current sweeps me out to sea. The beach shrinks, getting farther away by the second. I swim back toward shore with all I’ve got. I don’t get any closer, but I don’t get any farther away either. Wait. This is wrong. They tell you not to swim against the current. I try swimming with it, but that’s wrong, too. I spin in a circle, looking for the beach. When I find it, I swim parallel to it. My arms and legs are exhausted, but I make it out of the rip current. Then it’s a long swim back to shore, which I don’t have the energy for. My head slips under a wave. I flail my way back to the s...