Revealing mistake: Bond's stunt double is incredibly visible running up the stairs at the antenna, while being shot at by 006. The double is visible again when Bond jumps down the stairs and rolls. (01:58:10)
Revealing mistake: When Bond kicks Trevelyan off the antenna ledge, the side-on shot reveals both stuntmen instead of Pierce Brosnan and Sean Bean. (02:02:41)
Revealing mistake: When Xenia dies and the helicopter is about to explode, the pilot is replaced with a very obvious stiff dummy which falls forward without control.
Revealing mistake: In a close-up of Xenia rapelling down from the helicopter, you can see that Xenia is not Famke Janssen but a stunt double.
Answer: "Don't even breathe. Where are the others?"