Lee Marvin faked the recoil from the .44 Magnum when he shoots in Lynne's bed. These were in fact blanks, but afterward when shooting in Alcatraz they tried with real bullets and there was no recoil at all. Marvin said to director John Boorman, "Fiction overtakes reality". Marvin's revolver was a Smith & Wesson Model 19. It's a .38/.357 Magnum, not a .44 Magnum.