I really couldn't believe my eyes what happened next. As on queue, the geese either side of the middle one just attacked it and pushed it under the water. Having been watching the developements I'm certain that this was a planned attack. They really attempted to keep the goose underwater for as long as they could. I'm not sure the lone goose knew what hit it. One minute it was floating quite merrily on the lake, the next minute it had two others trying to drown it. A really amazing thing to watch. Never knew that geese could coordinate something like this.