The Omega Man
In the science fiction thriller "The Omega Man" (1971), Colonel Robert Neville (played by Charlton Heston) is seen traveling to a movie theatre in Los Angeles to screen the film for himself alone. "Woodstock" had been a recent film debuting prior to release of "The Omega Man", and had been held over (continuously run) in some theaters for months. Neville darkly remarks the film is so popular it was "held over for the third straight year". As he repeats some of the dialogue verbatim, it is clear that Neville has repeated the ritual many times during the two years that he has believed himself to be the last man alive on Earth.