Well, a kid jumping out of the fog would be pretty scary! I'm sure that was effective...
I took a look at the pushindaisies site and there were some fun things on there! I liked those skeleton grip bracelets.

Hmm...I don't know if your wife will ever come to like the car. I'm not sure what could change my mind about it. I have a feeling I would be nervous the whole time I was in there feeling like the car was haunted or something! I bet the attention you receive is fun though. There is a guy who owns a goth shop around here and he drives a hearse to advertise the shop. For some reason there is a baby doll strapped to the back of the car. So creepy but memorable!