When I was a kid my parents had a lot of company. People would just stop in or they often invited people over. It was customary for my dad to offer them a drink or a beer. After they had finished their first beverage he would always say "you can't stand on one leg," meaning have another drink and another round would be passed.
Well, obviously our ducks can stand on one leg. Here they are in the driveway enjoying a puddle that has formed there during our very rainy days this last week. They are not only standing on one leg but they are sleeping on one leg!