I've seen quite a few elaborate mirror pranks on YouTube and Facebook, but this one has to be my personal favorite. As an avid gamer and Anime junkie myself, I don't think this would actually scare me, but it would most likely keep me entertained for hours on end. If you've lived under a rock for the past 20 years, Anime by definition is:

a Japanese animated production featuring hand-drawn or computer animation. Anime includes animated television series, short films and full-length feature films. The word is the abbreviated pronunciation of "animation" in Japanese. In English, the term is defined as a Japanese-disseminated animation style often characterized by colorful graphics, vibrant characters and fantastic themes.

Watching the different peoples reactions are classic though, from the "scared-to-death" to "this-is-the-coolest-thing-ever". I'm not sure which Asian country it was created in, but having lived in Japan for a year, I don't ever remember public bathrooms of this proportion being unisex. Maybe I missed something.