You must have seen cats jumping from great height and still landing on their feet properly without even a single damage. Yes, that surprises me too sometimes. I mean how could they be so flexible? But guess what I know the answer. This is because cats have more vertebrae than a normal human being. Cats have 53 vertebrae where as humans only possess 34 vertebrae. So basically you can never beat your cat when it comes to flexibility, because they are beating you by 19 vertebra already.