Thanks to Katie Kendrick for this YouTube video:
I'm amazed at how graceful her hands are, especially when she's using both hands at the same time. She may have done those same pictures a thousand times but when she throws the sand back down she's giving herself a new challenge each time. At first I was confused about the people in the audience crying but a little research gave me the info that she was depicting events about Germany conquering the Ukraine during WW II.
I never cease to be amazed at how creative people are all over the world.