What's this workout called?

There are two women doing their yoga, flying their bottoms in the air. But it's not called a frog pose. What is this really called?

Picture is here:
http://oi42.tinypic.com/16ghvb.jpg
@Anmolverine
Bottoms Up by Trey Songz <----- LOL. I am not talking about music. I am talking about these two girls doing yoga, flying their bottoms in the air. But good try, sir!