thornburg describes it in its entirety. >> she starts by sort of rocking it back and forth.olding two hands. and then, before you know it, she's flipped the baby up and she starts to swing it, you know, like she is starting to make pizza dough or something. then she lets go of one arm and she has just got the kid by one hand. a little bit of lariat action. 30 seconds into it, your jaw is just on floor. >> throughout, the 2-week-old baby girl seems to remain calm. >> throughout, the 2 week-old baby girl remains calm. >> that's why a lot of people are thinking, well this is not real. because no child could sit through that kind of thing without howling or something. >> far from harming the child, fokina and her followers say this practice of dynamic gymnastics, sometimes called baby yoga, actually aids in development. >> my russian friends said, yeah, they start walking more quickly and start talking and start reading at a younger age. >> but these claims are not supported by scientific evidence. >> there's been no big scientific study, what happens if you take ten babies and