The Portuguese Water Dog is, surprisingly enough, a swimming breed. To Dex's misfortune, by the time she was of swimming age, the water was about 3 degrees. Not wanting the first encounter to be negative, I'd put off introducing her to the water.
Not to tip off the punchline, but my hot tub is 3 feet below a corner of my deck. This morning I was reading therein, relaxing to the sunrise over Puget Sound, when Dex came galloping around that corner and lost her footing on the slick deck. Well, they say you should go in the water with your dog the first time...
Terror ensued. Hers, too.