Fire Evacuation of Otakon, Baltimore Convention Center, July 31, 2010

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During the annual Otakon anime convention someone pulled the fire alarm, which resulted in the evacuation of between 20,000-30,000 participants, many of them were dressed in costumes. During the chaos of such an evacuation, some people were dancing in conga lines and there was even an outbreak of Rickrolling (http://en.wikipedia.org/wiki/Rickrolling).

After being outside for over an hour, the convention was gradually reopened. The official word from the Otakon organizers was that there was no fire. Some jerk just decided to pull the fire alarm.

Human-made No record of this work says a model made it. What this means.