Revealing mistake: While the credits roll, Harry enters the Swiss mansion, the camera turns to a green-coloured night-vision filter and one can notice that the man entering the house is Harry's stunt double.
Revealing mistake: When Arnold horseback rides towards the hotel, Tom Arnold's van skids and you can see that he is a stuntman with a very cheap latex mask to resemble Tom.
Revealing mistake: When Harry confesses to Helen that he's a spy she punches him and knocks him down. When he falls one can notice it's Arnie's stunt double.
Revealing mistake: In the scene at the beginning of the film where Faisal is in the van and decrypting the files, he says "Yeah, I got your password," and then the camera swings down to show his fingers on the keyboard, pressing repeatedly on the same set of keys and looking rather unrealistic. (00:07:30)
Revealing mistake: When Arnold is riding his horse through the hotel fountain, you can see that the scene had been rehearsed shortly before by evidence of water splashed on the concrete support pillars before the horse ever runs by them. (00:37:10)
Chosen answer: He just exclaims, "Shit!" It's not what he says that makes the henchman let him go, it's that they both realize that if they don't find cover they'll both likely be shot by this random, firing Uzi.