SO true. Once I saw my 3yo slip under the surface of the pool literally 18 inches behind my husband, who had no clue anything was wrong until I managed to shout. There was no splashing noise, nothing. The utter silence of that event still haunts me. What if we both had been looking the other direction, even if only for a few seconds? What was only a scary few seconds could have been the end of my sweet little boy. The incident made me a lot more vigilant around water than I already was, not to mention a lot less judgmental of parents whose children drown. It can happen so very quickly and silently.