I found this on youtube and thought it was worth showing. Why? Because "The Sound of Music" is my all-time favourite film. I also love these "let's all go and dance in the station" things - as well as the "let's all go and stand still in the station" things.
Anyway, here it is -
And, if you feel the urge, when it's finished, click on some of the links along the bottom. There are quite a few "let's dance in the middle of the street" things.