1. Listen to this through headphones.
This incident took place a Salvation Army concert in Tiptree, Essex.
2. It doesn’t happen often, according to BBC News.
Julian Bright, conductor and bandmaster of the Salvation Army’s amateur London Central Band, which was playing at the time, says he’s never experienced anything like it, despite his 35 years’ experience playing in brass band and various music groups. “I actually thought something in the PA system had blown up,” he said.