God! It makes me queasy just posting that pic.
I live on a huge beautiful pond (in these parts we call all lakes no matter how big "ponds") it is spring-fed and lovely and I can't bring myself to swim in it. I will canoe out with the kids and hang out in the canoe or on the "beach" while they swim but I just can't bring myself to do it. Why? Because ever since I was a little kid growing up in NYC I have been terrified of natural bodies of water because I am convinced there are shopping carts submerged down there waiting to entangle me.... This is the stuff of nightmares my friends. Nightmares.