Director Fred Zinnemann said that the black smoke billowing from the train is a sign that the brakes were failing. He and the cameraman didn't know it at the time, and barely got out of the way. The camera tripod snagged itself on the track and fell over, smashing the camera, but the film survived and is in the movie.
Cinema, short for cinematography, is often used to refer to the industry of films and filmmaking or to the art of filmmaking itself. The contemporary definition of cinema is the art of simulating experiences to communicate ideas, stories, perceptions, feelings, beauty or atmosphere.