Before the studio emblem or opening credits, the following message is narrated as well as seen on screen: "Ladies and gentlemen, the motion picture you are about to see contains seen so terrifying the public must be given grave warning. Therefore, the management has instituted visual and audible warning at the beginning of each of the Four Supreme Fright Points."
" The Fear Flasher is the visual warning."
" The Horror Horn is the audible warning."
" Turn away when you see the FEAR FLASHER!"
"Close your eyes when you hear the HORROR HORN!"
Patrick O'Neal, the villain of the piece, is inexplicably omitted from the cast list in the end titles.