My pullets can catch some air if something startles them, or if they're trying to get around a hen by going over them. A few days ago I went to let them out for some yard time, and I guess the littles weren't expecting me, because 2 of them suddenly screamed and flew straight up, hit the run netting (a little over 6' up), managed to turn the corner while coming back down, and flew right out the open run gate.