In the beginning of the movie, the camera pans down a hallway with the sign "authorized personnel only" and we see two mentally unstable people in what looks to be prison cells. They both appear to be in distress.
The whole atmosphere of the movie is honestly quite unsettling and disturbing. Individuals who have been in mental/criminal institutions and/or who have had past trauma dealing with places like this, or really bad experiences with psychiatrists/therapists, should be very cautious of this movie.
A mother stabs at a door (behind it is her fearful child) and screams "Open the door! It's your mother, open the door!"
Beware of this movie if you have any sort of history with mental illnesses, trauma, or mental hospitals/asylums! A lot of the content can be quite triggering for those who have been through things such as that in the past.