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.

When Roy is talking about his ideal life with Lynn, he mentions his three children, "Vera, Chuck and Dave," a very slick reference to the Beatles song "When I'm 64."

After Rathbone slams the Roy O'Bannan books Owen Wilson said " Whoah, Whoah, easy." This is the exact line he said in Zoolander; hand movements and all.

Within 15 minutes of each other, this movie has thinly veiled copies of Indiana Jones movies. The secret fireplace statue deal is right from Temple of Doom, the spinning fireplace fight deal is from the 3rd movie I think (but is probably derivative of earlier movies) and the torch flame exposing an exit is also out of an Indiana movie.

The portrait of the young man under which Fann Wong hides was used again in another Jackie Chan film - "Rush Hour 3." This time, an assasin throws a knife atJackie and hits the portrait instead.