I don't know much about it, but I thought I recognized a number of yoga asanas. (And then when that reminded me to go looking online for another pose that I saw photographed, that I thought was a yoga asana, I found several more of these feats pictured on yoga sites, performed by other people.)

So yeah, a healthy dose of genetic flexibility and an amazing amount of muscle control to be able to get in and out of those poses smoothly. Just another reminder of why I should be doing yoga regularly