Factual error: The first Kinetoscope (arcade of 'personal movie viewers') was opened in 1894 and the first motion picture studio was located in New Jersey. There is no way that they would have known enough about motion pictures in 1887 to go into them, let alone go to Hollywood to do so. And the use of the word 'movie' is at least twenty years too early.
Trivia: In the final minutes of the film, Jackie Chan & Owen Wilson slide down the British flag that is draped over Big Ben clock tower. This is the same stunt performed by Pierce Brosnan & Michelle Yeoh in the James Bond film "Tomorrow Never Dies". The only difference is that in TND, they slide down a banner of the main villain's face. One possible explanation is that Jackie & Michelle have been known to compete with each other for the most daring stunts.
Chon Wang: It's a puzzle box. I don't know how to open it.
Roy: What do you mean, you don't know how to open it? You just get a hammer and smash it open so you can see what it says.
Chon Wang: No. I must have patience. By the time I'm able to open it, I will be ready to read the message.
Roy: Oh, come on, Confucius, that's the corniest thing I've ever heard.