This video is one of the many reasons I just love dogs. They always seem to have a mission in life and much like  in my own life, they do the same things over and over again only to meet with disappointment. This feisty fellow has found a rock in a pond and he would like to keep it for himself. Gravity and physics appear to have a different plan for the rock. This doesn't deter our hero as he proves if at first you don't succeed try and try again.