Expert floor 9 is this 9th stage you encounter in the expert difficulty in challenge mode. This floor is highly known for its thin and very narrow paths that form an oval. This stage is similar to choice but it is thinner, longer, and curved. There are many different paths you can take to reach the goal but it ranges from 0.5 to 0.1 inches. You must have a perfect balance in this game to take on this level as the time is short and the tracks are thin. In Super Monkey Ball Deluxe, this floor is named Tracks and is given a 7 out of 10 difficulty rating.