"Hey now!" said Twilight. "I promise nothing will go wrong. And there's no way it'll cause any real physical damage." She paused. "At least, I hope not." "And I never specifically said you were going to be the guinea pigs, although I think if it works, you'll want to try it out." She levitated the thickest book in front of her, and began, "I was going through an old spellbook by one of the Starswirl the Bearded's apprentices. You wouldn't beleive the magic they had then! Full etheral manipulation charms, a sonic ranging sensing spell, alchemic triple inversions . . ." Spike was giving her the "no one knows or care what you're talking about" look. BLushing, she cut her sentence short. "Anyway, I found a time spell. It's not a travelling spell, like the one in the archives. It's more like a . . . manipulation spell. It should enable me to accelerate or reverse the effects of time on specific, which could be very helpful. Like Applejack, you could grow apples in a day, and Pinkie, you could make treats three times faster than you would normally." "But before I try it on a living, breathing pony, I want to use a less . . . vulnerable test subject." She levitated a small potted plant into the room. "I'm going to try to make it grow five years in five seconds. Are you ready?"