Three of the main characters were the same actor, and yet there are shots with all of them in the same scene. When I saw this as a young adult I didn’t even notice that Mike Myers was playing three roles and was genuinely dumbfounded years later when I found out.
How did they do those scenes so seamlessly?
I personally have never noticed flaws when such tecniques are employed, but it may be just immersion doing its job. I’ve never heard of Austin Power being singled out for its special effects…