 Dustin Hoffman devised the moment when he throws his wine glass  against the wall during the restaurant scene with Meryl Streep. The  only person he warned in advance was the cameraman because he wanted  to make sure that it got in the shot. Meryl Streeps shocked  reaction is real, but she managed to stay in character long enough  for the director to yell cut. In the documentary on the DVD she  recalls yelling at Hoffman as soon as the shot was over for scaring  her so badly.