Within four or five years, these young men’s health was ruined by the stress of work in the factories. Scenes of factory interiors account for only about (2)______ of the footage of Modern Times, but they contain some of the most pointed social commentary as well as the most comic situations. No one who has seen the film can ever forget Chaplin vainly trying to keep pace with the fast-moving conveyor belt, almost losing his mind in the process.