Visible crew/equipment: During the opening credits, when the camera pans, looking at the photos of Jon and Garfield, you can see the camera reflected in the glass of some of the pictures. (00:00:35)
Garfield: The Movie (2004)
1 visible crew/equipment mistake - chronological order
Directed by: Peter Hewitt
Starring: Bill Murray, Jennifer Love Hewitt, Breckin Meyer, Stephen Tobolowsky
Revealing mistake: When one of the men picks up Garfield from his cage to display to potential buyers at the pound, you can see the man's right hand "entangled" with the computer-generated Garfield.
Trivia: Bill Murray agreed to be in the film without reading the full script upon seeing the name "Joel Cohen" listed as a writer. It turns out he thought he was signing onto a film co-written by "Joel Coen" of the Coen Brothers fame. It wasn't until he began recording his lines sometime later that he realised his mistake.
Answer: He's a cartoonist.