Eisenstein was a pioneering Russian film director who developed the theory of montage, where juxtaposing edited images can create new ideas beyond the individual shots. He believed editing shots together could make the whole greater than the sum of its parts. Eisenstein best demonstrated this in the famous "Odessa Steps" sequence of his 1925 film Battleship Potemkin, where rapidly cutting between shots of a crowd fleeing down steps stretched out the sequence for greater visceral impact and manipulated the audience's perception of time.