"And if you're a golfer and you watch a golf film and Matt Damon swing, and it's not great, then you're not going to believe in the golf story, you're not going to believe in the rest of the film. That's the whole movie, so if that swing looks like crap, the movie's crap"

This quote by Shia LaBeouf is referring to the significance of realism in movies. He is stating that if a golf film features Matt Damon swinging a golf club and it looks impractical, then the audience will not be able to suspend their disbelief and the whole movie will be ruined. This is since golf is a sport that requires a lot of ability and accuracy, and if the swing looks bad, then it will be challenging for the audience to believe in the story. LaBeouf is stressing the value of realism in movies, and how it can make or break a movie. He is recommending that filmmakers ought to pursue realism in order to produce a credible and satisfying film.