Your post title send shivers down my spine. Over 25 years ago I anchored a 17 foot boat, by the stern, in Hammersly Inlet South Puget Sound. It was slack tide. I was catching some nice bluebacks then the tide changed and started to go out. It wasn't long before it picked up tremendous speed (The tides down there can reach 20 feet at certain times of the year) and the boat started to take water!! Luckly I had a knife handy, cut the line just in time to save my a$@. I have never forgotten that moment and never want to repeat it again. I had my 6 year old son in the boat and neither of us had life jackets on. Again, not to be repeated. Jonezee