Received the following from Sam Golden:
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Ok…so you’re in the back seat in a glider.  And you’re bored. 
Bored enough to climb out of the cockpit while Buddy #1 flies the glider.

Do you:
A)  Slide out and sit on the end of the wing, just to make the flying challenging
B)  Somersault over the edge and hang underneath the wing of the glider.
C)  Drop off the wing of Buddy #1’s glider onto the wing of Buddy #2’s glider, flying formation with you
D)  Stand up on the top of one glider and GRAB HOLD of the other glider’s tail.  While it flies in formation above you.  Upside down.
E)  All of the above.
 
www.dailymail.co.uk/news/worldnews/article-1265891/Hold-think-youre-going-Skydiver-grabs-gliders-tail-fin-fly-2-100-metres-100mph.html