Look upon me Equestria, for I am the Doctor

Rarity, using her new wings, enters herself in the Best Young Fliers' Competition, and suffers a fatal fall. Can the Doctor save her?

As most of us know, Rainbow Dash saved Rarity's life in the Best Young Fliers' Competition. But what if Rainbow Dash hadn't been there to save her? What if originally, she wasn't? What if a mysterious man who only goes by the Doctor actually played a role in it?