they must have used a fire extinguisher!! but all this is besides the point or for that matter very secondary...
For us Aarti and Arpita might be Living and Dead respectively, but for Yash it was a war between Living and Living... Arpita for him has been a living person for more than 4 years... and suddenly seeing every memory of Arpita burn right in front of his eyes was like a splash of cold water on his face...He had to chose between Aarti and Arpita... his heart told him save Arpita... but his mind and logic told him save Aarti... and Yash chose to listen to his mind and logic...both of which until then just flew out of the window where his memories of Arpita were concerned...
The incident got Yash back to his senses...made him realize when he save Aarti that hello Mr Yash your Arpita is dead! Its was a Shock for him which left him angry on himself!!
Today in true terms Arpita's funeral pyre burnt for Yash!!!
Love Punar Vivah!! Love AarYa!!