HistoryHackey Sac, or Footbag as it is commonly called, has only recently become a sport. Versions of the activity have existed in Chinese, Native American, Thai, and other cultures for hundreds of years; however, a formal structure for the sport was not adopted until 1972, when John Stalberger and Mike Marshall created the format used today. Hackey Sac now falls into one of two categories: freestyle and net footbag. Freestyle, like that of other sports, consists of a routine of difficult stunts completed in succession with a maximum number of difficult stunts performed in a minimum time. Soccer net resembles volleyball in the use of a net (although only raised to a height of 5 feet), except instead of manipulating the "ball" with their hands, players use their feet. The topics discussed on these pages will focus on the freestyle elements of footbag rather than the net due to the more complex movements involved in freestyle. PurposeHacky Sac, like most sports, consists of correctly applying physics concepts to physical performance. Logically it follows that there are some "tricks". ...