Revealing mistake: When David is re-loading his gun whilst out duck shooting, we see three ducks flying to the right and then immediately to the left, revealing that it is the same film in reverse.
Straw Dogs (1971)
1 revealing mistake
Directed by: Sam Peckinpah
Starring: Dustin Hoffman, Susan George, Peter Vaughan, T.P. McKenna
Continuity mistake: When Amy tells David to go out and get some lettuce, David notices the addition symbol on the blackboard was changed to subtract by Amy earlier on. At this point, there are two subtraction symbols between the equation, but in the next shot the left subtraction symbol has changed to an addition, and in the shot after that, it becomes a subtraction again.
Reverend Barney Hood: And now for my next trick, the piece de resistance, I present to you an empty glass. I will now fill this glass with milk.
Chris Cawsey: Would it work better with whiskey, Vicar?
Reverend Barney Hood: Nothing works better with whiskey.
Tom Hedden: I do.
Reverend Barney Hood: You've never worked a day in your life, Tom.
Trivia: Dustin Hoffman didn't want to do this movie as he was not a fan of violent films. He later admitted that he only took up the role for the money.