First Glitches, Then Boos at Opera Festival — billboard.com

Bayreuth's annual opera festival has gotten off to an unexpectedly dramatic start, with a technical malfunction forcing an interruption shortly after the opening performance of Richard Wagner's "Tannhauser" kicked off. German news agency dpa, citing its reporters at Friday's performance, said the audience was asked to leave the auditorium after about 20 minutes for safety reasons. It said spectators heard two bangs and saw parts break off a mobile cage on the stage.

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