Delightful part. Loved the aftermath of Kara waiting for someone to do something so she can set it down. Truly great fun.
As for the cliffhanger, I think we all saw that coming.
A tiny nitpick, you don't get contrails because you are going high and fast, they are from the exhaust from a jet or rocket.
The other type of contrail is seen at low speeds and low altitude and I doubt the human body shape would create them.
http://en.wikipedia.org/wiki/Contrail You might enjoy having her rip a hole in a cloud as she leaves. See Distrail in the above cited link