A dragon float was supposed to be breathing fire, but the dragon's head ended up engulfed in flames.
Video of the fiery dragon head shows its mechanical mouth and neck still operating as workers tried to put out the flames.
Local firefighters responded to the fire, but it had already been extinguished by the time they arrived. No one was injured in the incident, a Disney World spokesperson said. The dragon, which has a steampunk-looking design, was then brought backstage with smokes still blowing out of its head.
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A Disney World spokeswoman said the company was still in the process of figuring out what went wrong.
"Poor Maleficent the dragon set on fire during the Festival of Fantasy Parade yesterday", one Twitter user tweeted about the unfortunate accident.
Another park employee is stationed towards the rear, while additional costumed cast members travel by foot.