The movie medium is sometimes described as a ribbon of dreams, but there have been surprisingly few great dream sequences on film. There’s one in Buñuel’s Los Olvidados, with a boy imagining his mother and a dripping slab of beef; and Bergman’s Wild Strawberries opens with a chill, funereal passage. Fellini’s 8 1/2, which in a newly struck print continues at the Paris, has as its opening perhaps the greatest dream scene of all: Marcello Mastroianni’s Guido stifled in a silent traffic jam, onlookers gazing blankly at him as he rises through the sunroof of his car, high into the sky. The rest of the film isn’t too shabby, either.