Deliberate mistake: There is no way for Gus to jump over the terrace with the skis since there's no ramp. He would have crashed against the wall and the flower pots we saw in a previous shot.
Deliberate mistake: When a man bumps into pole, it sounds as if a truck had crashed (which makes it funnier), but in reality he just bumped his chest.
Answer: There were rumors that Hackman was angry with the Salkind Brothers (the producers) for firing director Richard Donner, though Hackman later disputed saying that. His explanation, though he may have been downplaying the real reason, was that he had a number of other movie projects at the time, and he also did not wish to continually play the same villain in an ongoing movie series.
raywest ★