The procession then moves to Phaya Thaen field, where hundreds of rockets will be launched. The first rocket is fired to predict the amount of rainfall for that growing season. That is, if it goes high up in the sky, there will be plenty of rain and a good crop.
The rest are set off to ask for rain. The owner of a rocket which does not rise after firing will be thrown into the water as punishment for making a dud rocket.