10 Great Movies With Terrible CGI

For the most part, the special effects in Forrest Gump look breathtaking. Most viewers didn't have an inkling that the feather in the opening shot was computer-generated. People are gobsmacked when they learn every ping pong ball that Forrest plays with is digital. The greenscreen used to depict Lieutenant Dan without legs looks just as good now as it did back then.

But there was one special effect that looked bad, even when the film was released. Throughout the movie, Forrest rubs shoulders with many famous people throughout history including John Lennon, John F. Kennedy, Lyndon B. Johnson, and Richard Nixon. Instead of relying on body doubles, the film digitally inserted Tom Hanks' character into archival footage to make it look like he was meeting these historic figures.

Although these scenes look convincing at first, the VFX is all over the place when it comes to each character's mouth. If you analyse the lips of Nixon, Johnson, or Kennedy's in these moments, they clearly don't match with what they're saying.

Sometimes, digital trickery is used to make the lips move a certain way, which makes it look all the more superficial.