'I first saw Mikhail Kalatozov’s The Cranes Are Flying in Chicago in 1957. The film’s cinematography, by the great Sergei Urusevsky, has been a major influence on my career. The shot in the film that stands out most for me starts at about twenty-five minutes in. It begins handheld, when the character Veronica looks out the window of a bus, and continues out into a vast crowd of people. Then there’s a fast lateral movement going out of the bus and past a car, which could be just a great handheld move or was perhaps done on an improvised dolly. We can see a wide street through the crowd. Veronica stops for a beat of three seconds at the edge of the boulevard—at this moment, a crane seat was slipped under Sergei. The camera then cranes up to see the tanks and a wide view of the crowd.’— Haskell Wexler (who won the Oscar for the cinematography of Who’s Afraid of Virginia Woolf and Bound for Glory)Source (includes video of the short scene described in the cited text) 

'I first saw Mikhail Kalatozov’s The Cranes Are Flying in Chicago in 1957. The film’s cinematography, by the great Sergei Urusevsky, has been a major influence on my career. The shot in the film that stands out most for me starts at about twenty-five minutes in. It begins handheld, when the character Veronica looks out the window of a bus, and continues out into a vast crowd of people. Then there’s a fast lateral movement going out of the bus and past a car, which could be just a great handheld move or was perhaps done on an improvised dolly. We can see a wide street through the crowd. Veronica stops for a beat of three seconds at the edge of the boulevard—at this moment, a crane seat was slipped under Sergei. The camera then cranes up to see the tanks and a wide view of the crowd.’
— Haskell Wexler (who won the Oscar for the cinematography of Who’s Afraid of Virginia Woolf and Bound for Glory)

Source (includes video of the short scene described in the cited text)