OK, probably everybody but me but I honestly didn't know you could intentionaly make a double exposure. I should have figured this was possible because of the technology but until I started playing with the bells and whistles (something Paul suggested of just getting out and playing with the camera) I didn't know I could do it.
I'll also admit that this "ghost rock" photo was taken purely by mistake. Even thought it's not a photo anyone would want to look at really I just thought I would post it for the other one or two people in the world that didn't know this was possible. LOL