User blog comment:Kogath/Monster Hunter 4 Ultimate for the Nintendo 3DS/@comment-25192100-20140727082744/@comment-25119729-20140727164038

Actually Alatreon is able to fly or walk independant of it's state. If not forcefully brought down(ballist binder), it will remain in the air for an amount of time, even when the rage mode fades. And if this happens, it is also likely that it will enter rage but remain on the ground, because it was in the air just a short time ago.