A Free Ride, also known as A Grass Sandwich, is a stag film of the silent era, considered the earliest extant American hardcore pornographic movie. It depicts a motorist who picks up two women from the roadside and later engages in several sex acts with them. Although most scholars consider A Free Ride a 1915 film, some sources claim that it was produced later. The film’s director used a pseudonym and the cast remained anonymous. The filming location is not known, although it may have been produced in New Jersey. Two contradictory theories have emerged regarding the identities of the cast: some sources suggest they were people with low social status, but others assert the opposite. The Kinsey Institute has a print of the film in its collection. A Free Ride was screened at the inauguration of the Museum of Sex. In 2004, Lisa Oppenheim, a New York-based artist, remade the film.