I live in a condo and since I moved in a few years ago every once in a while I see a shadow just standing there, looks like a man with a coat. My girlfriend have seen it and she didn’t want to say anything until I saw it again last week and told her. She tells me that she didn’t want to sound crazy but she has seen the same all around the house. She also tells me that my 8 month old son follows something with his eyes but there is nothing there. Also I am not sure it’s related but things disappear around the house for month and then they reappear in the most obvious places where we already looked for it many times. Should I do anything? What is this thing? Any ideas????