What movie mistakes have you caught? One that may or may not be a mistake is when the camera pans and you see a glare of the light on screen (with a red or orange spot). Either from the sun or from a bright light such as a car headlight. This breaks the illusion of the movie for me. I've only seen this recently in films and I don't know if it is a careless oversight. I would imagine that is is easily fixable with CGI.