<P> Other gadgets include a bullet - proof invisible wall in Max's apartment that lowers from the ceiling, into which Max and others often walk; a camera hidden in a bowl of soup (Cream of Technicolor) that takes a picture (with a conspicuous flash) of the person eating the soup with each spoonful; a Mini Magnet on a belt, which turns out to be stronger than KAOS's Maxi Magnet; and a powerful miniature laser weapon in the button of a sports jacket (the "laser blazer"). </P> <P> Another of the show's recurring gags is the "Cone of Silence". Smart would pedantically insist on following CONTROL's security protocols; when in the chief's office he would insist on speaking under the Cone of Silence--two transparent plastic hemispheres which are electrically lowered on top of Max and Chief--which invariably malfunction, requiring the characters to shout loudly to even have a chance of being understood by each other . Bystanders in the room could often hear them better, and sometimes relay messages back and forth . The Cone of Silence was the idea of Buck Henry, though it was preceded in an episode of the syndicated television show Science Fiction Theatre titled "Barrier of Silence", written by Lou Huston, that first aired on September 3, 1955, ten years ahead of the NBC comedy . </P> <P> The car that Smart is seen driving most frequently is a red 1965 Sunbeam Tiger two - seat roadster . </P> <P> This car had various custom features, such as a machine gun, smoke screen, radar tracking, and an ejection seat . The Sunbeam Alpine, upon which the Tiger was based, was used by customizer Gene Winfield because the Alpine's 4 - cylinder engine afforded more room under the hood than the V8 in the Tiger . AMT, Winfield's employer, made a model kit of the Tiger, complete with hidden weapons . It is the only kit of the Tiger, and has been reissued multiple times as a stock Tiger . </P>

What type of car did maxwell smart drive