yeah but then Cid would probably have some remote to make the ship rush down to catch him lol (remember the "luck" he had in the original game? :P)
as for cloud, he would somehow land sideways on a building and run along it then jump on top of the airship and sit there til it landed lol.
Final Fantasy is pretty good at defying physics (FF2= a castle in a cyclone?, AC= the tunnel fight with Loz, Yazoo, and Cloud)