Revealing mistake: When Graham and Stella are in bed, the camera shows only their arms intertwined as if he's lying on top of her. She's gasping loudly in response to his thrusting, but their arms never move back and forth to reflect this, so it's clear they're not really having sex.
A Shock to the System (1990)
1 revealing mistake
Directed by: Jan Egleson
Starring: Michael Caine, Swoosie Kurtz, Elizabeth McGovern, Peter Riegert
Deliberate mistake: The same shot of the railway station concourse is used when Graham and George are heading to work, and also when George commits suicide. The giveaway is that several people are seen in the same position. (00:05:00 - 01:20:30)
Melanie O'Conner: I think it's rotten, Mr. Marshall. The only reason you didn't get that job is 'cause they didn't give it to you.