[She pauses, her eyes scanning him a moment--not unfriendly, but assessing. When she finally speaks, it's deliberate, and rather more sober than she's been with him before.]

You might be able to learn, if you can control your energy well enough. But human bodies aren't meant to travel at those speeds--if you overdo it, you could shatter your own bones.

[And she'd just as soon not be responsible for that happening to him.]