Here is "Gordon" as a kitten and later as an adult (today) at the end of the video (15 months old). He was birthed by his mother in the rafters of a barn, and fell down from the nest. Although   more...his condition may be due to the fall, it has the symptoms of Feline Cerebellar Hypoplasia. It's almost like his hind motor skills are separate from his front. As a kitten he would frequently flip over forward (seen once in the video).
As an adult he is able to function fine, not all cats with this condition are so lucky. The only thing special about his care is blocking him from stairs to another level of the house with a baby gate. The more he is able to concentrate on his standing/walking/running, the better he is able to do. When his attention is diverted, that's when he tends to fall over.  less