 On the day of shooting for the 1970s flashback shootout,  George Kennedy (I) (qv) had come down with pneumonia. He was so  ill that he couldnt even walk. To make sure the scene was shot, the  director had Kennedy sit on a bar stool for his entire part in the  scene. Notice when Frank meets Ed, Ed never gets up from his stool.  When Ed is supposed to leave, leaving Frank alone with Tanya,  Kennedy simply just leaned back out of the shot to create the  illusion of his character getting up and leaving.