[A momentary jerk, but Keith holds on, leaning down closer to Shiro's back, trying not to grin like a maniac as he does it, but it's kind of hard to keep that expression off his face.

Once it seems they're done accelerating at least, he leans up.

And the only answer that Shiro will get at first is a laugh. An entirely pleased adrenaline-filled laugh.]

Fast. Real fast. Faster than anything open-air I've flown in before. But the harness is holding. ...you might knock someone loose who isn't ready for it though.