A hacky sack or footbag is a small, round bag filled with hacky, which is kicked into the air as part of a competitive game or as a display of dexterity. "Hacky Sack" is the name of a brand of footbag popular in the 1970s (currently owned by Wham-O), which has since become a generic trademark.
Hacky sack games are similar to earlier Asian shuttlecock sports such as jianzi. The most common game of hacky sack when two or more players stand in a circle and try to keep the sack off the ground for as long as possible.
Footbag-like activities have existed for many years. The game is similar to traditional Asian games of kicking the shuttlecock, known as jianzi or chapteh. The game is also similar to some South East Asian games, such as sepak takraw and sipa. This game is known as jegichagi (????) in Korea. The Wu Style Tai Chi Chuan practice dates back to at least the 1930s, and policemen are seen playing a shuttlecock game in the 1955 American movie To Catch a Thief. The same principle is applied in football-playing countries in activities of freestyle football and keepie uppie.
The current Western incarnation of the sport was invented in 1972 by Mike Marshall and John Stalberger of Oregon City, Oregon with their "Hacky Sack" product, the rights to which are now owned by Wham-O. Although Marshall suffered a blood clot and fatal heart attack in 1975, Stalberger continued the business. It gained national popularity in the early 1980s, and Stalberger sold the title to Wham-O in 1983.
The game of hacky-sack remained popular throughout the mid 1990s among the hippy, stoner and grunge crowds, but experienced a falling-out with the turn of the century. Hacky-sack was a popular game played during free-periods at schools around the world in the 1990s and early 2000s. It has also been used in various music videos such as Weezer's "Say it Ain't So".
For circle kicking, it is very common to use a crocheted footbag, which is usually filled with plastic beads. Casually, footbags are often differentiated as normal (indicating a plastic-pellet filling), or as "dirt bags" or "sand hacks" (indicating a sand filling). Sand hacks are typically considered ideal among casual, beginning, or intermediate players, who use them as a learning tool, as they are easier to control and stall than a crocheted bag filled with plastic pellets.
In the freestyle footbag discipline, a 32 panel bag is the generally accepted standard (the number of panels on commercially available bags can range from 2 to 120 panels). Stitchers generally use Plastic Poly Pellets, sand, BB's, steel shot, lead shot, seed bead, or tungsten shot as filler. Most professional stitchers use a custom combination of different fillers to make the bag play better. Bags usually weigh between 40 and 65 grams, depending on the type of filler and amount of filler used. 32 panel bags do not stall as easily as a "dirt bag" or "sand hack," but set truer from the foot, allowing for more complex tricks. Professional footbags are usually made out of the fabrics ultrasuede light, facile, or amaretta. While these bags can last a long time with proper care, they are quite fragile relative to their more common crocheted cousins.
The footbag net discipline uses a distinct bag, characterized by a harder outer surface than other footbags. These bags are not suitable for freestyle, and vice versa.
There are also several novelty products available, including glow in the dark, chain mail, and even flame retardant bags that can be set on fire and played with. The fire footbag has been banned in South Australia.
Several shoe modifications are common in freestyle footbag. In order to make toe stalling easier, many players use special lacing patterns that pull apart the sides of the shoe near the toe area, creating a broad, rimmed platform. Modified lacing is augmented by cutting away the stitching that joins the row of eyelets to the toe. The area that is created by completing these modifications is called a toe box.
Shoes can be further modified for freestyle footbag by removing layers of fabric from the inside, outside, and toe surfaces. These modifications are advantageous because they allow players to more accurately feel the bag on their foot.
Circle kicking is the most common game played with a footbag, and is often what people mean when they use the term "hacky sack". Players stand in a circle and keep the bag moving around the circle, with the goal of keeping the bag from touching the ground. There are a variety of terms used by different groups of players to note when the footbag has been touched by every member of the circle.
The game starts when one player picks up the sack and tosses it to the chest of another player, who allows it to fall to his feet so he can kick it, and play begins. Play continues until the sack falls to the ground, then a player picks up the sack and the game resumes. The object of the game is to keep the sack off the ground for as long as possible. If every player gets a touch to the sack before it hits the ground, it is called a 'hack'. If every player gets two touches before the sack hits the ground, it is called a 'double-hack' and so on and so forth.
Circle kick is generally accompanied by an unwritten set of etiquette guidelines designed to keep the game fun, friendly, and open to everyone including new players. The most basic rule is to respect all other players. Some other general guidelines include picking up the footbag after you drop it or kick it away, rather than having someone else retrieve it; not serving the footbag to yourself; not spitting in the circle; and not hogging the footbag (often called jestering, or the player may be called a hack-hog) and making sure to pass the bag to players who have not gotten it recently. Most circles are very open to new players and will not ostracize anyone for being less coordinated or well practiced than the rest. Some circles have an unwritten rule that there is no apologizing when a person drops the footbag. This guideline is designed to keep the new players from feeling as if it is their fault that the game is slow, and it keeps the experienced players from having to constantly reassure the new players that it is not their fault. Variations on circle kicking are numerous and spontaneously created.
Freestyle footbag is a sport in which the object is to perform tricks with the bag. The ending position of the footbag on one trick becomes the starting position of the footbag on the next trick. Tricks are created by combining different components between contacts with the bag (contacts can be either stalls or kicks, though stalls are more frequent). Components include spins, dexterities (using a leg to circle or cross the footbag's path in mid-air), jumps, and ducks (letting the footbag pass a few inches above the neck). Contacts are usually on the inside of the foot behind the opposite support leg (Clipper Stall) or on the toe, however many inventive possibilities remain and are used to create an endless list of tricks. A partial list of freestyle footbag tricks can be found at the official Footbag WorldWide Information Service.
Various styles have developed as the sport has become more popular. Players can choreograph routines to music, alone or in pairs, executing difficult moves in sync with the music--the result is something like a cross between rhythmic gymnastics and figure skating.
There is an annual footbag world championships held each year. The current freestyle world champion in singles category is Milan Benda, of Czech Republic, in doubles Tomas Tucek and Martin Sladek.
In footbag net, players (either playing individually or with a partner) volley a footbag back and forth over a five-foot-high net. This game combines elements of tennis, badminton, and volleyball. The court dimensions and layout are similar to those of badminton; the scoring is similar to the old scoring system in volleyball (a player must be serving to score); and serves must be diagonal, as in tennis. Footbag net games can be played to 11 or 15 points, although the winners must win by at least two points. Rallies in footbag net look a lot like volleyball (e.g., bump, set, and spike), with players spiking from an inverted position in mid-air (over the net) and opponents often digging very fast spikes into bumps or sets. Play in footbag net is very similar to Sepak Takraw. However, in footbag net, it is an "upper-body foul" if the footbag touches any part of a player's body above the shin.
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Although there is no 'winning' in the original game of hacky-sack, several variations have come into play in recent years. These include three-hack-slap and hack-elimination. The rules to three-hack-slap are as follows: play begins in the same fashion as the traditional game, but after three players have volleyed the sack consecutively, any player may slap the sack in an attempt to hit another player. If the slapping player succeeds in hitting another player, the player that was hit is out indefinitely until the next game begins. In some versions of the game, if a player is 'out', they may still participate in the game, but they may neither slap nor be slapped. The three touches taken before the slap must be taken by separate players. For example, if a player gets fed the sack, and kicks it up three times, that counts as only one touch. However, if the sack is kicked by one player, then another, but returns to the player who kicked the ball originally, that does count as three touches. Essentially, every time that the sack changes feet, that counts as a point towards the three points necessary to slap. Play continues likewise until one player remains, that player is crowned the winner, and play restarts. In hack-elimination, play also begins like in the original game, and as play goes on, every player tries to get a touch on the sack. If everyone has touched the sack except for one person, the player who has not yet touched the sack is ruled out. Play continues until only two players are left, and those two are the winners.
Another more aggressive variation on the hack-slap called 'killz' exists ideally for bigger groups. In a bigger group you may come across players with varying skill levels and the lesser skilled are a risk for not being able to complete a full hack. This variation allows 3 touches anyway possible if it be with one, two, or three players out of the x number of participants, after which you may kick the sack as hard you like in the direction of any player to try to get them out. Defense is important as you are allowed to block, which encourages trickier play: fakes, stalls and rebounds. This game has one winner.
The Guinness Book of World Records has recognized footbag consecutives world records since the 1980s. There are several categories of records, all variants of the "consecutives" discipline. The current records are listed below.
There is also an unofficial records list for consecutive individual freestyle moves.