Trivia: Initially banned in Kazakhstan, the ban was lifted after the film sparked a tourism boom.
Trivia: The participants of this 'mockumentary' (none of whom were in on the joke) were all made to sign a release form so that the film makers could use the footage. In spite of this, several of those interviewed have since made unsuccessful attempts to sue the distribution company for fraud and defamation. Those that took action included the etiquette coach, plus two of the students with whom Borat hitchhikes with.
Chosen answer: This was the Mississippi United Pentecostal Church annual camp meeting of 2006. "The power of Jesus" compels many people to sing, dance, etc...as far as the weird language, it's known as "speaking in tongues" and is generally incoherent to the casual observer. The hands in the air is a symbol of someone literally "lifting" themselves and their hearts to Jesus in worship and prayer. It's all simply an expression of their faith and religious beliefs, nothing more.
Jazetopher