I guess besides things like Santa Claus and the Tooth Fairy ...

My mom told me a witch named "Pat" (no idea why Pat) lived next door and if I did anything bad she would come take me and I would have to live with her. I came to be very scared of Pat.

My mom must've put my Hello Kitty doll in the washing machine because I remember the eyes falling out of her head. She told me she was going to send it for "repairs" but I never got it back. Grrrr.

I'm sure there were lots of other ones ... my mom liked to pull stuff like that!