Twilight gyrated inside, pinned on the “wall” of her spell. It was more thrilling than any carnival ride found in Equestria. And yet, despite bouncing uncontrollably in the streets of Outer Grove, despite her sudden urge to lose her lunch, despite all of that, the princess held onto her spell. The moment she’d let go, she’d turn into a tumbling mess of gore. That alone was all the motivation Twilight needed to keep her horn active.