Help remembering a movie i started watchint but forgot thr name.?

I Started watching a rated R movie recently but forgot the name. The opening scene of the movie was a guy filming his girlfriend while they walked through a dark basement. When the girl went through a dark doorway something or someone hit her in the face, then the thing came after the guy who was filming. He inevitably got caught by the thing and dropped the Camera and his body dropped in front of it soon after.

Any help is appreciated!