Before coming to Moscow, I had only one idea of what the metro was like, and it came from this video clip. It’s the ending of the 1964 film Я Шагаю по Москве (or Walking the Streets of Moscow in English.) The main character is singing the titular song while exiting the University metro station.
Some time last week, our grammar teacher let us know about a flash mob that would be happening in that same spot to commemorate the 50th anniversary of the film’s release. We didn’t really know what to expect, but we made sure to get to stantsiya Universityet by 11 pm last Tuesday to see what would happen. When we arrived, the station was buzzing with anticipation – extra security was standing around, there was a somewhat large crowd gathered at the end of the station, lots of green “Metro” balloons, and several heavy-duty video cameras.
We found a wall to lean on and waited, and to our dismay we were approached by one of the heavy-duty video cameramen and a guy with a microphone. After getting over a split-second of pretty intense fear, I managed to say a couple words. You can watch the Pyatnitsa [Friday] news program that we were featured in here:

For non-Russian-speakers, the gist of our clip is that even foreigners know about the film and the famous song.
As for the flash-mob itself, a band played and the crowd moved through the metro and up and down the escalators a few times while loudly singing, and kind of reliving that famous scene. Thankfully the woman on duty didn’t interrupt us this time.