Over 22,000 people had gathered around an elaborate satellite stage, which was projecting the Tomorrowland concert straight from Boom, Belgium. The festival, which originally started in Boom, has grown to worldwide popularity since its beginnings in 2005. Tickets for the festival are in such high demand that the festival now live-streams music to locations around the world, including Barcelona, through Unite with Tomorrowland.
But due to a "technical malfunction," things did not go quite as planned. Here is the moment the flames began.
At first the revelers seemed not to notice, and the party continued onward.
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