There's a "tingler" in all of us-though it only comes to life when we are frightened-and to prove the point, William Castle, the master of screen showmanship, projected The Tingler in thrilling "Percepto." Installed in some theaters, Percepto guaranteed a spine (well, bottom)-tingling experience for all. Vincent Price is Dr. William Chapin, a researcher whose experiments hint that we have nothing to fear but fear itself-fear being a deadly, lobster-like parasite, the tingler, that lives on the spinal column and can be arrested only by the natural outlet of a good, bloodcurdling scream. Dr. Chapin's postmortem on the deaf-mute owner of an all-silents movie theater confirms this notion, but not before her tingler has escaped into the theater and made a screening of Tol'able David intolerable. "(It follows) Castle's usual format of laying down a persuasively horrific exposition and then, at the right moment, parodying it outrageously." (Monthly Film Bulletin)