"The Tingler" is a 1959 horror film directed by William Castle. The story revolves around a creature that feeds on fear, which is discovered by a pathologist named Dr. Warren Chapin. The Tingler is a parasitic entity that attaches itself to the spine of its victims, causing them to experience intense terror. The film is notable for its unique marketing gimmick, where audiences were given a shocking experience through the use of "Percepto," a device that delivered mild electric shocks to select seats in theaters. This interactive element aimed to enhance the viewing experience and engage the audience in the film's themes of fear and suspense.