

According to an eyewitness, someone held a champagne bottle with a burning Roman candle in it too close to the ceiling (iirc she was already high up on someone’s shoulders), causing a quick deflagration through the wooden structure.
Here’s an article with a picture showing the sparks igniting what seems to be very shoddily installed, uncovered isolation foam.
Ok to points 1. and 2.
But where is this Shangri La you speak of?