Revealing mistake: When Jack and Joan escape in the F16, if you look at the back wheels, you can see the car driveshafts that drive the wheels. Jet aircraft don't have driveshafts.
Revealing mistake: In the scene where Jack wrestles the native for Joan's hand in marriage, the native is wearing a wedding ring.
Revealing mistake: Joan gets splashed by Jack's water skis and goes inside the boat to watch a picture of the two of them on a tropical beach. The picture is blatantly fake: Jack's legs become invisible at one point, his skin looks wiggly were it's been pasted and no shadows match at all.
Revealing mistake: Jack is on a platform next to the burning stage. In the close-ups it's Michael Douglas, but in the wide angles it is a skinny stuntman with light hair who looks nothing like him. (01:34:10)
Revealing mistake: Inside the train, a couple of the musicians can't help staring at the camera.
