Prithviraj starrer Vimaanam which hit theatres last Friday, has opened to impressive reviews from the audience and critics alike. The movie directed by Pradeep M Nair and produced by Listin Stephen, is the tale of a young man who makes an aircraft of his own. The makers of the movie held free shows on the Christmas day and had announced that the earnings of first and second shows of Vimaanam from the next day onwards will be handed over to the real inspiring man behind the making of Vimaanam, Saji Thomas. However, all thanks to the notorious website Tamil Rockers, a pirated copy of Vimaanam is now making rounds on the internet. Reportedly, the police have registered a case and the investigation is underway.