 According to Robert Mitchum (qv), during the filming of the final  fight scene between he and Gregory Peck (qv), Peck once  accidentally punched him for real. Mitchum, knowing that Peck didnt  mean to and ever the professional, refused to break character and  continued filming the scene. However, upon entering his trailer,  Mitchum said he "literally collapsed" due to the impact of the punch  and said that he felt it for days after wards. According to Mitchum:  "I dont feel sorry for anyone dumb enough who picks a fight with  him (Peck)."