.
In the Northeast
It’s really believable and amazing of Mekong River because of fire balls or people call that บั้งไฟพญานาค. Fire balls happen specifically in Nong Kai only, along to Mekong River. Not happens in others and can see this from Laos bank. The legend told that when the Buddha went to meet his mother on ดาวดึงส์ paradise and then he came back to the earth on The End of Buddhist Lent Day. He spread his hand out impact heaven, human world and nether world connected each other in this day. So Nagas blow fire balls to show welcome and finally became origin of Fire balls.