Fergus, who we used to think was the smart one, apparently didn't realize that just because there's moss on the surface of the river, doesn't mean it has become land that you can jump onto. Poor little fellow has never swum a stroke in his life (shelties hate water), but he came up doggie-paddling for the far river bank for all he was worth. He was shortly rescued by the heroic if reluctant intervention of a fully-clothed yours truly. At least I remembered to set down my cell phone before jumping in.