One gorilla prefers to keep his hands clean. Louis lives at the Philadelphia Zoo where staff members say he usually walks around on only two legs. That's not common for gorillas, which usually lean on the knuckles of their hands to get around and only walk upright briefly to reach for food. Staff members say Louis doesn't like to get dirty, especially when his hands are full of snacks. InsideEdition.com's Mara Montalbano (https://twitter.com/MaraMontalbano) has more.