Most of the time, a cat will land on his feet when he falls. His body reflexively corrects its course so that by the time he arrives on the ground, his feet are in position to hit first. The height of a cat’s fall determines how well, or how poorly, his legs can absorb the shock of landing. A cat’s ability to land on his feet isn’t a trick taught by his mother or life experience, but is a gift of nature. By the time kittens are about 6 weeks old and able to run and jump in a coordinated way, their bodies can successfully correct their balance during a fall. However, your cat still needs to be protected from the risk of falling. If you have some open windows in your high-rise apartment or upstairs in your house, be sure they are properly screened. Source: AnimalPlanet