Catch the sphere, kitty! Fetch the newspaper, feline! Get the Frisbee, kitty!

http://wiki.soippo.edu.ua/index.php?title=%D0%9A%D0%BE%D1%80%D0%B8%D1%81%D1%82%D1%83%D0%B2%D0%B0%D1%87:Vgaylord7sa5

Those aren't commands you're most likely to be releasing to your cat anytime soon-- at the very least not with any success. Felines aren't precisely responsive to that sort of training.