I'm telling you, he's not a clumsy cat, he's a fairly agile, climbing-talented weimeraner.
Nimbus and Grue don't fall off anything. Grue likes to get put up on top the wardrobe but she wants to be lifted up and carried down, if left up there she paces back and forth merping and sobbing. (Once I coaxed her down with her favourite snack and she made, finally, the BRAVE AND FEARLESS leap from wardrobe to bed my old cat could have made at 17 years old - a good half hour of histrionics later).
And Nimbus is too fat and lazy to climb much, he's happier on the floor with the crumbs.