Ah, I didn't think of that. I stand corrected. :)

What about the points when it entered / exited the jet stream? Won't there be turbulence at the edges of the jet stream? A bit like how jumping into / out of a speeding bullet-train could cause some damage.

Wouldn't this paper glider have encountered jet streams? How did it survive them? https://secure.wikimedia.org/wikipedia/en/wiki/Jet_stream

The pen is mightier than the sword?