http://www.youtube.com/watch?v=7EYAUazLI9k
From March 23 2009: in a promotional stunt for a Belgian reality-TV program "In Search of Maria" "The Sound of Music", more than 200 dancers (with just two rehearsals!) put on this number from "The Sound of Music", in the Central Station of Antwerp. It's staged of course(!), but the passengers weren't in on it. Some discussion here.