Dr. Strangelove or How I learned to Stop Worrying and Love the Bomb (1964)
The Fearless Vampire Killers or: Pardon Me, But Your Teeth Are in My Neck (1967)
The Incredibly Strange Creatures Who Stopped Living and Became Mixed-Up Zombies! (1964)
And my favorite long movie title -
The Persecution and Assassination of Jean-Paul Marat as Performed by the Inmates of the Asylum at Charenton Under the Direction of the Marquis de Sade (1967)
