These days, it's not uncommon for actors to be heavily modified with computer generated imagery (CGI) or replaced altogether. When an actor, stunt person, or a stand-in wears those special form-fitting suits you'll see throughout this list, it allows the visual effects artists to monitor their movements and transform them into a giant gorillas, talking trees, or fire-breathing dragons, and so on. Digital effects technology advances exponentially every year, but those spandex suits covered in sensors still look really silly.
This list compiles those amazing moments before real people are replaced by digital effects, when they're still just a silly humans acting like a trash talking raccoons or vicious velociraptors. Which, it should be noted, isn't easy. These performers are doing a tough job, but they sometimes look hilarious doing it. That's why we put together a behind the scenes slideshow of people who will be replaced by CGI through movie magic. Vote up the funniest pictures below!
Raptors: Much More Frightening in Person
Historical Fact: Pirates Dressed Very Differently Than You Thought
Pirates of the Carribean: At Worlds End
Making Magic the Muggle Way
Harry Potter and the Half Blood Prince