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From Wikipedia: Bun Bang Fai Fair (งานบุญบั้งไฟ) Being held in the sixth lunar month (May) every year. There is a rocket contest to worship Phaya Thaen or god of the rain. It is a way the local people do to ask for rain. A temple fair will be organised in the grounds of Wat Pho Chai. Rocket shooting will be done on the field around 10 km. from Wat Pho Chai. Filmed by Craig Arnoldt while on holiday in Thailand, 3rd June 2004.