So the video features three friends at college. One of the friends keeps a pulling jokes on the other two friends like tripping them, pulling the chair out before they sit down, and driving off while saying he'd give them a ride. The other two friends decide to get him back and stick a Kick Me sign to his back. The "Kick Me" sign is also written in Chinese or Japanese. So the guy is walking down the street with the kick me sign when he passes a meditating ninja. I'd say the ninja was being so secretiving that the guy didn't even see him and the only way we saw him was by high speed camera. Anyway the ninja sees the kick me sign and follows the guy. The ninja takes a flying leep and knocks the guy down with a ninja kick. To finish him off the ninja woops out his katana and stabs him in the back. Now here is where we find out it isn't a real ninja. The ninja stabs the katana in the dirt to pick up the katana sheath. **BBBBBBBZZZZZZZ**. A real ninja would never defile the blade like that. You won't get the "Fin" joke in the title until you see the video so what are you waiting for?
