In reality, the "T-shirt incident" was staged to add drama to the film, and the scene where Waller confides his scheme was filmed "after" the Mr. Universe contest actually took place. Waller can actually be seen wearing two different shirts in different camera angles in that scene, making it obvious that it was set up. Waller and Katz were, in fact, friends – as Waller recounted in "Raw Iron – The Making of Pumping Iron" – but his reputation as a "villain" remained. "I would go to contests and get booed, after that!" said Waller in a later interview. Waller had an uncredited, but prominent, cameo in the film Stay Hungry as "Dougie Stewart", the rival of bodybuilder Joe Santo (Arnold Schwarzenegger.) This film was written by Charles Gaines, co-author of "Pumping Iron". He also appeared in the B movie "Kill The Golden Goose in 1979", "Flex" and in "King of the Beach", an episode of The "Incredible Hulk", in 1981.