Geez, first of all…that is a woman that is swinging the baby, not a man. Second, who gives a shit how “fluid” the movements look in the damn video?! Of course they’re not going to post the ones where they messed up and dropped the baby or whatever. This lady should not be doing stuff like this with a baby, it’s sick and dangerous. She may think there’s benefits to it. But the risks are far greater.