"So Ah guess y'gotta see it t' believe it," Applejack sighed. "Jus' watch." She trotted up to the giant stranger, careful not to look too closely into the dark blue eyes: the visitor was nowhere near their level of intellect, and panicked easily. "Ah'll just take out one..."
The one was accepted and, in the typical fashion, utilized. Applejack started to canter forward, gradually accelerating. The brown horse began to move, matched the pace, straining towards full gallop --
-- stopped.
Completely stopped.
Big Mac blinked.
"That was fifteen body lengths," he slowly said.
"On the downhill, yeah," Applejack groaned. "And then she won't move until she gets some more."
"She goes fifteen body lengths on one carrot?"
"An' she won't eat more than five at a time."
The stallion took a deep breath. "And we've got to get her all the way to Canterlot. On hoof."
"That's what the Princess said. Don't know if it's safe to teleport her, and she'll just freak on the train."
The siblings stared at each other. The visitor. who was waiting for more food, simply nickered.
"Well," Big Mac sighed, "welcome to the best day of Golden Harvest's life..."