my guess is is that Noon hates temples because in the previous life the praek left her for the temple to become a monk...the mom is afraid of noon because she probably sense that noon is not what she looks to be... as for your question about the fire balls that came up from the river...it is believed that a naga (sea serpent) which is what noon was in her previous life...spouts those fire from the bottom of the river and it actually occurs in several places along the mae Khong river which borders Thailand and Laos....