Being flexible is actually a Thames bloodline gene, it's one of the best in their genetics. It comes third in line by agility and beauty. Sometimes, it's a bit concerning to be able to bend your body as if you don't have any bones. But of course, to maintain elasticity - an every day stretch is needed. Whether it is running or tumbling on every random corner of the house. or, Cale is now a maniac stretching his limbs till he can reach the ends. Kim Rok Soo fears for his life, for some reason, on the other side.