The director of Iron Man John Favreau originally asked Ghostface to make a cameo appearance in the hit movie because John knew about GFK’s love for all things Iron Man. Unfortunately the scene that Ghostface filmed with Robert Downey Jr was cut from the final print of the movie. Here is that scene that was left on the cutting room floor. Note that the scene was never finished so the sound is not complete and green screen effects were never finished as well. (Source)