People will do wild things to be the centre of attention, and gigs are not immune to this, despite the performers being the ones who surely deserve all of the focus. If you’ve paid good money to be at a concert, then the chances are you’re not there to watch the crowd, and even if something exciting is happening off-stage, the hope is that it won’t be the highlight of the show or indeed what it is remembered by for eternity. Call me boring, but …