UPDATE: 30 people injured after a balcony collapse in the #Apollo theatre in London's West End. Details @thetodayshow pic.twitter.com/8ahzM0qxeQ
— Nine News Australia (@9NewsAUS) December 19, 2013
More info here.
"We thought it was water... We thought it was a part of the show. I grabbed my kids and ran."
Another witness said she heard a "strange crackling noise" before "the roof just crumpled".
The theatre "suddenly went dark" with "dust clouds everywhere", she said.
"You could see everyone ran off the stage... it went dark".