Robot Cat is a lethal humanoid mecha controlled by an adorable but ferocious kitten. Robot Cat rescues animals and seeks revenge on animal abusers! However, the robot doesn't always function at peak efficiency in this video by Sylwester Wardęga (previously at Neatorama).
English captions are available, but not really necessary. You'll need to turn them on if you watch the making-of video, which is in Polish. It's quite funny, and you get to see more of the kitten. -via Metafilter