This moment is so shocking and brutal that it's wild the movie studio put it in the trailer. Why ruin the surprise?! Still, seeing Sue Anne decide to get revenge on one of her high school tormentors, Mercedes (Missi Pyle), by running her over with her truck and leaving her bloody, mangled body on the side of the road is pretty gruesome . . . especially when it's immediately followed by Sue Anne having a disco music party in her car as she speeds off.