James nodded, glad to see that she did indeed have a sense of her own mortality. Those who didn't generally died very gloriously, and very badly. A little bit of fear was a good thing. The agent could guess that the student would likely get herself in trouble because she was adventurous, and enthusiastic, but hopefully it wouldn't be too badly. Merely a lesson learned.
Like any form of transportation, there were various ways to get from point A to point B, most involving different levels of effort, speed, etc. Most of the time it was instinctive, which one to use when - no one ever teaches a child that coasting down a hill on a bike is the simplest way to go. It's just natural to do it that way. But some things have to be learned, like floating in water when swimming would tire you out.
James managed not to grin at her determined preparation - the messy bun, the mental psyching up... As she raced toward the edge of the roof, James was right behind her, quieter though - perhaps she wouldn't even notice. While she was, for a moment, suspended in air, the mimic knew right away that something was not right. And then the flapping. James clenched his jaw against what was sure to be a difficult maneuver and swooped down, reaching out to grab her by the waist and glide them both down at a less painful pace.