Ahabob, you can get into the sky map if you save over a file that has a bird, but haven't gotten the goddess sword. If you try and fly here during bit, you can get to the sky by heading into a loading trigger somewhere around the east side of Skyloft. This takes you to either the Loftwing practice or Wing Ceremony thing depending on how far in the game you are.
So, if you can figure out (or already know) how to gain back control after the thunderhead cutscene plays, and can clip out of the practice area, you could possibly reach the thunderhead couldn't you?
sounds interesting...
Something that I experienced the other day was the cutscenes playing as soon as I selected the file without saving or picking up fruit, This is probably already known but I don't look much into BiTE, when I saved again on that file though, it didn't happen again... I was selecting a file saved in BiT skyloft
I've never experienced a cutscene playing just by selecting the file from the file select. From my experience...
Rolling into the tree by the bug kid always plays cutscenes related to file 3.
I can activate cutscenes fairly consistently by going up to a bird statue and not saving. What file is selected here determines what cutscene plays.
Saving the game seems to "lock-in" a file.
Dying and continuing, or entering skyloft at night seems to re-activate any cutscenes that play.