Both stories highlighted an unexpected danger in a common activity: eating Halloween candy and eating movie popcorn. Both stories called for simple action: examining your child’s candy and avoiding movie popcorn. Both made use of vivid, concrete images that cling easily to memory: an apple with a buried razor blade and a table full of greasy foods. And both stories tapped into emotion: fear in the case of Halloween candy and disgust in the case of movie popcorn.