The document discusses the use of props in horror films to develop themes and build tension. Masked killers in films like Friday the 13th and Scream wear masks to hide their identity and instill fear in the audience. The blue tricycle ridden by Danny in The Shining signifies something bad is about to happen, and could represent Jack's psychological problems. Its unusual three wheels may symbolize the different sides to Jack's warped mind. Popcorn left cooking unattended in Scream builds tension as it rises, relating to the audience and foreshadowing Casey's inevitable death from her risky actions.