theory11 — Magic Tricks & the World's Finest Playing Cards

Where can I learn this card fling?

It seems to be a flirt (a cardistry flourish) used at a shot.
(I think it might be taught in Shin Lim's IV, but, not yet having purchased the product, I can't be sure.)
 
It's not IV, he's basically just doing a card pivot, but let's it go. That's about as far as I'll explain it.
 
If you want to learn something like this, read Meir Yedid's Incredible Close Up Magic by Gary Ouellet. The Slingshot Snapout is a similar move.