It's Friday and it's not even lunchtime yet, nor can you go home. You probably need a pick–me–up right now, in the form of a really cute cat video. These kittens are wrestling each other in a tiny little wrestling ring. What else is the internet for? Seriously.
For more on martial arts, read our interview with Renzo Gracie, grandson of the founder of (human) Brazilian jiu–jitsu.