perhaps the girl is in hyrule, and uses the Skyward sword to communicate with Link once he gets it. then she could tell him that he needs to come to land to do something, which will in turn, cause him to need to return to Skyloft, and so on
In many of the previous Zelda titles when Link falls from a great height if you roll you won't get hurt so I bet that he just rolls when he hits the ground.>.>
Awesome sig made by me!
Games beat: Phantom Hourglass, Spirit tracks, Twilight Princess