Pet Bird Flying Around the House?

I've never had anything good happen while letting my birds fly anywhere. I had a Goffin Cockatoo that I didn't realize how long his flight feathers had gotten and this cause a tragedy. My husband was cleaning the cage and had the door open. Gizmo flew off the front porch and disappeared into the Chequamegon National Forest. It was the last snowstorm of the year. I've also heard stories, second hand of course, of birds injuring themselves or perishing from flying into walls or windows. I'm very careful to watch my flight feathers, now. Other than that, it's just been broken things, like a carnival glass bowl, but I can live with broken things as long as it's not my bird! I would never presume to tell anyone what to do, just offering my experiences.