Do you ever get the feeling someone is right behind you? Maybe you keep seeing something out of the corner of your eye and can't shake the feeling you're being followed? Well, if you happen to be on one particular cruise ship, you should go with your instincts... because there is a dance party happening. Right. Behind. You.
Maybe check to make sure there aren't people dancing behind you first and then click play to watch this clever flash mob dance prank from MediocreFilms unfold above.