There used to be a cat on the 6 floor (where I live) that landed on the lawn down below twice. I don't know if he leapt to grab a bird or lost his balance on the narrow railing.
After the cat fell the first time, his human who saw him go over, sat down and cried her eyes out. Then there was a knock at the door and the resident manager had the cat which he had found wandering around outside the front door of the building uninjured.
There was a calico cat who lived on this floor who lived to be 29. I don't think she ever jumped over!
FeLIX wants something by
LUMIN8, on Flickr