Do you believe in Ghosts? Or may be you've seen them? Or you've got a contact?

I think this is a part of our life like God or Devil or maybe something else. Honestly I've never had a contact with ghosts but only once I guess. Particularly I'm not sure if it was a matter which I could call a ghost. I even didn't see it. I just heard sound that was making me crazy and sometimes I wanted got out the apartment. People like to call this paranormal stuff like brownie, house-spirit or goblin. I remember he or she didn't like certain music and when I was listening to the radio my house-spirit just pulled out the plug from the socket. It's true! I still remember how he didn't like Marilyn Manson, I really like his creative work but my roommate didn't. It was like a battle for music. Since that I had a phobia of silence. Everybody have their own phobia so please don't laugh. Later I changed apartment and my phobia left me. So what about your supernatural guests?