Revealing mistake: When the old lady falls off her chair, you can see the wire pulling her off. (00:03:35)
Thumbtanic (2002)
1 revealing mistake
Directed by: Todd Portugal
Starring: Rob Paulsen, Steve Oedekerk, Mary Jo Keenen, Paul Greenberg
Deliberate mistake: When all the thumbs are at the wall saying "I'm the king of the globe" and "I'm a dentist" you cannot see their legs, so that saved some costume work.
Sub Pilot: She's naked... and she's not wearin' any clothes, too.