The MMA community is, as a whole, pretty inventive when you get right down to it. The MMA community has been known to hit photohop pretty hard whenever something funny happens and they also do some ridiculous stuff with video. What better way to appreciate the knockout that was between Anderson Silva and Chris Weidman than in the style of Punchout from the NES?
You are right, there is no better way to celebrate it. This is really quite well done.