Continuity mistake: When Sean Connery kills the soldier telling Nicholas Cage to get on his knees at gunpoint, Sean Connery takes the rifle and rests the stock on Nicholas Cage's shoulder. In the wider shot when Cage takes hold of the gun, the stock is a slightly different style than the one that was on his shoulder.
Continuity mistake: When they fire the missile, they say its headed for the game in Oakland. The tracking computer shows it heading for the Oakland Coliseum but when its diverted it shows it was about to hit Candlestick park in San Francisco.
Continuity mistake: When Mason pulls Goodspeed out of the water in the next scene they are both completely dry hair, clothes, face but when Goodspeed is picked up his hair, clothes and face are wet.
Continuity mistake: In the beginning of the movie as Hummel visits his wife's grave, the rain changes from shot to shot, in some it's raining heavily, while in others barely at all. In the shot just before we see who's grave it is you can see blue sky behind Hummel.
Visible crew/equipment: Right near the very end where you have the overhead shot of the bombs hitting the back of the island you see Stanley Goodspeed being thrown through the air by the force of the explosion, and into the water. As he is flying through the air you can see the wires he is attached to, to make him fly.
Visible crew/equipment: In the interrogation room, it shows the mirror reflecting Mason, Goodspeed and the other guy. Look carefully: for a split second you can see a shine of a watch, then an arm, of the cameraman.
Continuity mistake: When Goodspeed is driving through the warehouse in his yellow convertible then smashes through the big glass window you'll notice that it's simply not possible. The window is about a foot off the ground, which means there would have to be a ramp. If you look closely there are two hinges at the bottom of the window which show where the ramp ends. The fact that there's a ramp at a dead-end window was poorly planted there by the crew.