Here's a brief write-up:
You're looking for a write-up on "Piranha 3D" and its connection to OK.RU! piranha 3d ok.ru
As for OK.RU, it seems you might be referring to the Russian social networking platform OK.RU (also known as Odnoklassniki), where the movie might be available to stream or download. Here's a brief write-up: You're looking for a