Strike me down in anger and I will always be with you...

Indeed, it should have been included in the movie if we were supposed to believe it was a legitimate part of the movie.  It is not in the movie.  At all.  I'd be interested to know if adding it to the novel was a retcon, but I am not familiar with the print schedule, nor am I interested in doing the required research.  When I read it in the novel, it felt like a retcon.