Janet Kwak
NBC Los Angeles
July 22, 2012

Examiner.com: Justin Bieber fans scream during his performance on July 18, 2012 in Sydney, Australia

More than a 20 people, including some teenagers, suffered respiratory irritations and burn injuries Saturday evening after exposure to “theatrical fog vapor” at a pre-party for the Teen Choice Awards in Hollywood, a city fire official said.

Witnesses said the incident at the Avalon Hollywood resulted in chaos, calling to mind for a panicked moment Friday’s shooting massacre at a movie theater in Aurora, Colo.

The incident was reported at 6:04 p.m. at 1735 N. Vine St. (map), Brian Humphrey of the Los Angeles Fire Department said.

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