Applejack: We're about to save my life.

Dr Hooves: I've been studying science my whole life.

Applejack: But Spike picked up too much in the Pridelands with a quiet place to rest.

Dr Hooves: My life's work, decades, centuries, really, of research and experimentation, and I still need to get my suit has vanished and this was the only thing left in my closet!