According to the website Atlas Obscura the Giant Swing is 88 feet high and:
For centuries, the Giant Swing played a central role in annual swing ceremonies that symbolically reenacted elements of Hindu origin stories. The swing ceremony had teams of Thai men in elaborate headdresses competing to launch themselves into the air, where they would use their teeth to catch a sack of coins tied to the top of a pole. Unfortunately, the Giant Swing ceremony was discontinued in 1935 after several participants fell to their deaths.
Luang Prabang & Bangkok trip report: http://bit.ly/17Q0Cup