Wasn't there a recent case where the shoppers freaked out and the mall they were "flashing" got locked down or something?
Yeah, the same mall that had the huge fire a week or two before. But it wasn't the shoppers who freaked, it was the aw-thor-i-tees. Apparently, the group planning to do the flash mod Hallelujah Chorus announced it ahead of time, and by T minus 20 or so the food court was so overcrowded the aw-thor-i-tees ordered the mall evacuated. They later did the chorus in the parking lot.