The Greatest Hollywood Trailer Ever Made

The art form of the Hollywood theatrical trailer is dead. Modern trailers are the only thing possibly worse than the mediocre studio output being produced today. At least they are 2% the running time, I guess. 

Over 40 years ago, 20th Century Fox scarred the shit out of the world with William Friedkin's masterful, genre-defining masterpiece, The Exorcist. In a rare moment of corporate marketing genius, an inspired, nameless exec developed perhaps the most inventive, absolutely terrifying theatrical promo spot ever. 

Can you imagine what it would have been like to be an unsuspecting 70s theater-goer blasted on mescaline and have this epileptic nightmare flash inside your brain?