I remember that dog one too! Yuch, I wonder if it's true?
I have a scary myth, ever since I heard about I've been a little paranoid about being on my own with a mirror =L
If you turn the light off in your bathroom at midnight, and keep a large mirror in there, you can make a ghost appear. Say "Bloody Mary" twelve times and look in the mirror. I havn't tried this, and I never will, but apparently a woman wearing a black cloak appears in the mirror!!!

And she'll either scare you, scream, give you a gift or kill you...
It's probably not true, but you can never be too sure
