The successful use of three films:Momentum of Electrons, The Ultimate Speed, andTime Dilationas “experiments” in the second year Physics Laboratory is described. The regular experiments in the laboratory are used to teach experiment design, measurement, and error calculation; and the film experiments were used to show how real physicists designed and performed their experiments using the same principles. The films also permitted the “use” of equipment not normally available to second-year students. Working in pairs, the students viewed the films, took data from the instruments shown, estimated the error in the measurements, then wrote up the experiment as a normal laboratory report. While the use ofMomentum of Electronsas an “experiment” was not as successful as was this use of the other two films, the class was enthusiastic over all three films, and was unanimous in wanting at least one film experiment of this type each year.