I've never been in a flash mob. But in light of the recent incident in the Organ mall, I wonder what the alert levels would be leading up to the actual outburst of song. Would somebody who stays aware of their surroundings start to feel the hair on the back of their neck stand up? People standing around obviously waiting for something. Maybe even catch a couple of folks making eye contact. Just seems like I'd be getting a little nervous until it became obvious that these folks would be singing rather than shooting.
Anybody actually been in one?