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Of all the gin joints in all the towns in all the world, she walks into mine.
— Rick Blaine · Casablanca

Behind the line May contain spoilers.
Our reading
An editorial interpretation.
The line is half complaint, half astonishment. It counts out every bar in every town in the world, then narrows to a single word, 'mine', as the odds of coincidence turn personal. Out of all those doors, she walked through this one, and the speaker can hardly believe it.
Context reviewed