Duncan bug

The Duncan Bug is a bug found in Final Fantasy VI, during the World of Ruin when you visit Duncan before recruiting Sabin and before learning Bum Rush. Whenever the player enters Duncan's home, Duncan will always start off his exercise with 2 leaps to the right, then go back by leaping twice to the left. However, if the player enters the submenu after Duncan has jumped to the right at least once, then exits the submenu, Duncan's routine will be reset, thus allowing the player to make Duncan leap to the right as far as they want, resulting in his sprite leaping completely off the screen.