I heard about the Kansas City flash mob of Handel’s Hallelujah Chorus from the Messiah on NPR yesterday. What began as Ann Sundeen’s idea and roughly 20 people turned into roughly 450 people singing in the Crown Center in Kansas City. They were inspired by the Philadelphia opera company who did this over Thanksgiving.
The video gives you more of a feel for the scope of the crowd singing, even if the camera work is a bit shaky. I can’t tell if that’s the person holding the camera or the reverberation of 450 people singing.