afterburn...

A group of about 10 hardy stalwarts stayed on after dark. It was like a private view but in reverse - bottle of bubbly, pizza all round. As we munched and mulled over the event inside the ash circle a light breeze would waft the embers and it would glow briefly and then die down again. Later a 4ft tornado of sparks momentarily whirled suddenly between the remnants of the steel supports and worked its way along over the ashes picking up sparks as it went before finally petering out.