When I first heard Big Ben chime (I'm talking about the bell now, just for this section only), I was stopped cold.
Why would a bell ringing fascinate me like that? Because I recognized it. It's very distinctive, and if you've ever seen an old black-and-white scary movie filmed on a set simulating London in the fog, and you heard a brash, hollow, echoey, loud chime, which was supposed to be Big Ben marking the hour, you were actually hearing a recording of Big Ben. I always thought that they picked a stock sound from their studio sound effect library, but I underestimated them...that's the real sound, and if you ever hear Big Ben in person, you will say, "Wow, Chris was right."
And when you're looking around in a clock store at clocks with chimes or grandfather clocks, and you see the label "Westminster Chimes", they're talking about Big Ben-style chimes. Big Ben and Parliament are in the city of Westminster--Westminster Abbey is right across the street from Parliament--and those familiar chimes that you've all heard all kinds of clocks make are based on the chimes that Big Ben plays.
All of this may have been obvious to you, but I don't spend much time thinking about things, personally.