 While Al Michaels (I) (qv) joined the film to recreate commentary  for the games, Gavin OConnor (I) (qv) decided to use the last 10  seconds of Michaels original "Do you believe in miracles?" call in  the film because he felt he couldnt ask him to recreate the emotion  he experienced at that moment. Thus they cleaned up the recording to  make the transition to the authentic call as seamlessly as possible.