The two audience members' attempts to cope with the high notes of "I will always love you" were not appreciated by either the rest of the spectators or the actors on stage. Afterwards, lead actress Melody Thornton posted an Instagram post in which she said, among other things, that she is sorry, and that she fought hard for them to end the show.
Maria Sid, theatre manager at Stockholm City Theatre, understands that it can be a problem if the audience sings along too strongly.
"A lot of people have paid to hear really nice singers and maybe don't want to experience sing-alongs at the time," she says.
Calls for more clutter in Sweden
The theatre union Bectu in the UK has recently carried out a study on how theatre workers are doing at work. The survey found that 90 per cent of those who work in British theatres have experienced bad behaviour by audiences. Almost half have considered changing jobs because they are treated badly.
According to Maria Sid, the Swedish audience is not nearly as messy as the British.
"In the Nordic countries, the problem is rather that it feels like the audience is sleeping, and that's almost harder. I wouldn't say I've experienced mess. I would rather say that, on the contrary, I have lacked a bit of a mess," she says.
As a football audience
in the UK, theatre workers report physical assaults, public urination, threats of violence, sexual harassment, racist taunts and destruction of theatre property, among other things.
"I feel the crowd in England is more football-like. I can understand that it can be a problem, but the audience must also be dynamic and alive, and at the same time you have to have respect for those who actually want to hear what is said on stage, says Maria Sid.