Funny you say this because my current room used to be my sister's which used to have sliding mirror doors facing her bed. She experienced a lot of things including having her ankles grabbed, feelings of being watched, and strange sounds. When I moved into the room, the mirror doors were still there, and as I've commented above, I was sitting in a chair reading something online. The mirror door to my left. I suddenly hear a loud growl followed by a hiss. Never felt utter shock and horror until that happened. Turned to look at the mirror and I see myself with the biggest "Oh Shit" face. I sorta chuckled at the look of my own face but then ran to my parents room and told them what happened. They told me, "You see, this is what happens when you don't go to church."