Ghost experiences? Anybody have some good ghost stories/occurances that have happened to them? ?

There's this cat that I always see out of the corner of my eye when i'm in a certain hallway of my house(the house it 100 years old) I always thought my eyes were just playing tricks on me because I have a real cat and i was probably just used to seeing him out of the corner of my eye but the other day my sister was talking about the same thing happening to her in the same hallway! spooky huh?