Our cats sometimes do a gymnastic “beam routine” on the railing upstairs, and they rarely fall, but on occasion, they slip. At least they only have less than a floor to fall onto carpeted padded stairs. If this Cereal ever stumbles, there is no way out. (Not that it’s not a cool pic.)
While it isn't something that a cat should be allowed to do, there is a good chance that it could survive the fall.
See the link in post 31 to read about High-rise syndrome.