About half an hour, and several crowd-pleasing songs, into Kate Bush's Wednesday-night gig at the Hammersmith Apollo it all went quiet.
Following an eerie pre-recorded video segment aimed at building up the tension ahead of the theatrical portion of the evening, an unexpected technical problem plunged the auditorium into darkness and silence.
To begin with, there was a suspicion that it was all part of the show, but after a few minutes the PA apologised for a technical fault and five minutes later announced an unscheduled interval.
Fans in the 5,000-seater west London theatre – some of whom had paid hundreds of pounds to see the queen of ethereal pop on her comeback tour Before the Dawn – were forced to draw on that Blitz Spirit, heading off to the bar to make the best of the situation.
Twenty minutes later they were called back and the show went on without any further hitches – a flamboyant, weird, occasionally mawkish production that will have left many feeling they got their money's worth and others wishing for a more intimate, stripped-down affair (featuring a few more old favourites).
The Before the Dawn tour marks Bush's first live performances for 35 years. Tickets for the string of 22 dates went on sale on 28 March, selling out in 15 minutes. The tour continues in London tonight and runs until 1st October.