Regina: I know she's kind of socially retarded and weird, but she's my friend... So, just promise me you won't make fun of her!
After the Halloween party, when Cady walks into Damian and Janis' house, Damian gets scared and tosses all of the popcorn out of his bowl. In the next shot of Damian his bowl is full again.
Tina Fey, the woman who plays Ms. Norbury, was also the screenplay writer for the movie.