Other Flags that Accidentally Appear in Serendipity 2001
A few random flags appear in the film Serendipity 2001. Along the NYC street side we can see the flag of Switzerland. Coincidentally the master of Synchronicity who invented the concept was from Switzerland - Dr. Carl Jung.
The flag of England appears in this movie. Note that the flag of England is different from the flag of the United Kingdom. Some people overlook that England is only a sub-national component of the UK which also includes Scotland, Northern Ireland, and Wales.
The flag of Germany just slips into the movie upon the back end of an airplane.
This first clip illustrates the phenomenon of Synchronicity in crystal clear film.