A lot of people ask about these guys flying in the house, through doorways and such with their wingspan. Now, Ollie has nothing on a macaw, but she still has to navigate fairly well to make it out of my bedroom into the living room. She is getting better by the day at flying- she can make it out of my bedroom when the door is only open about a foot and a half (I was in shock when this happened- it was a wake up call!).
It seems like some people clip because they don't feel they have a large enough open area for their birds to fly safely. If they get the practice and are able to perfect their skills, they don't need an arena to fly in! Ollie gets plenty of safe exercise in my tiny apartment, and even just my bedroom.
YouTube - Ollie Navigates the Hallway