Kintore-Z is a childlike robot athlete that falls apart when it over-exerts itself. Skip 50 seconds into the video to see what happens after too many push-ups.

The robot -- whose looks are said to be loosely modeled after Astro Boy and Mazinger Z -- was the 2007 winner of the annual Baca RoboCup competition, which aims to recognize Japan's stupidest and most useless robots.