In the movie Serendipity (2001), in the following dialogue between Jonathan and Sara, I don't understand what Sara means when she says "Um, favorite New York moment.":
Sara : Okay. Favorite movie.
Jonathan : The correct answer is Cool Hand Luke.
Sara : I've never seen it.
Jonathan : Oh, come on. You've never seen Cool Hand Luke? Paul Newman? Oh my god. Come on! "Failure to communicate." Sadistic cop in sunglasses with no name. Reminds me of you in that way.
Sara : Um, favorite New York moment.
Jonathan : This one's climbing the charts.
I highlighted in bold the part that I don't understand. What are they talking about here? Is there a movie called New York that Sara's referencing? Or if she's just asking about the best time that Jonathan has had in New York, then what does his reply "This one's climbing the charts" mean here?