Grave Encounters is a 2011 Canadian found footage supernatural horror film written, directed and edited by the Vicious Brothers. It stars Sean Rogerson, Ashleigh Gryzko, Merwin Mondesir, Mackenzie Gray, and Juan Riedinger as the crew of a paranormal reality television program who lock themselves in a supposedly haunted psychiatric hospital in search of evidence of paranormal activity, as they shoot what ends up becoming their final episode.
Grave Encounters premiered on April 22, 2011, at the Tribeca Film Festival. Prior to its premiere, its trailer went viral online, generating over 30 million views. The film had a limited theatrical run in select theaters in the United States, and was released on video-on-demand on August 25, 2011. Two months prior, the film had its Italian premiere via distributor Eagle Pictures under the title ESP Fenomeni Paranormali.
The film received mixed reviews, was a box office success, spawned a sequel in 2012, and has attained a cult following since its release.
(Summary from Wikipedia)