While they get along today, Arnold Schwarzenegger and Sylvester Stallone were rivals for the title of top action star in the 1980s. One trick the future former Governor did on the future director was getting him to star in the horrible Stop Or My Mom Will Shoot, with Estelle Getty as his mom (and without her Sophia costume). ScreenCrush tells the story. Personally that was a cruel thing to do, especially since he only has himself to blame for the far worse Junior. At least Stop Or My Mom Will Shoot theoretically had a good premise.