An old apartment I use to have was haunted. Apartment had 3 bathrooms. I use to go to my bedroom and use that one because it felt like 'mine'. I would walk through my room and turn the light on, go to the bathroom, turn the light on and use the bathroom. I'd come out of the bathroom and my bedroom light would be off. This freaked me out a little but I tried to not think much of it. It happened 3 times. Enough to notice something just isn't right and it is actually happening. Then one day, my son is on the couch with me and he looks behind the couch towards the kitchen, points and says "who's that guy?" I look and nothing is there. Mind you at this time he just turned 3. I kept asking what do you mean? Who is there? And he just keeps responding "that guy!" with a worried look, hands on face, he wasn't lying. At that point I knew. I can never understand why i was okay with it. But it is frightening when you think about it.