The scene in which Gruber and McClane meet was inserted into the script after Alan Rickman (Hans Gruber) was found to be proficient at mimicking American accents. The filmmakers had been looking for a way to have the two characters meet prior to the climax and capitalized on Rickman’s talent.
Both director McTiernan and Schwarzenegger lost 25 pounds during the film. Schwarzenegger’s weight loss was a professional choice. McTiernan lost the weight because he avoided the food in Mexico due to health concerns. (x)