Door Slamming By Itself In Morgue

I'm not a huge believer in the paranormal. But this one got me. Sent chills down my spine. This video was taken in a morgue in Brazil by security who heard a noise. When they arrived they saw a door repeatedly slamming by itself! You can see for yourself. And what is up with the light flickering? Does it have to be full on horror movie? See for yourself...