American football fans were forced to flee as freak wind gusts outside the Rose Bowl athletic stadium sent booths and tents flying in Pasadena, California.

The Pasadena Fire Department tweeted that four people were treated at the scene for minor injuries on New Year's Eve.

The incident occurred in the fan festival area where pop-up tents had been set up outside the stadium where the Rose Bowl college football game between Florida State and Oregon was scheduled for New Year's Day.

The video shows people fleeing the chaos, including one person wearing a cow costume, as tents supported by metal spikes fly high and then crash to the ground.

The Los Angeles Times quoted the National Weather Service saying it was a cold dust devil, a wind pattern that forms in clear, sunny conditions.

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